Author: claimsbot

1. A method for determining an analyte concentration in a sample, comprising:
generating an output signal responsive to a concentration of an analyte in a sample and an input signal;
determining a compensated output signal from the output signal in response to a primary function and a first residual function; and
determining the analyte concentration in the sample from the compensated output signal.
2. The method of claim 1, where the primary function includes an index function, where the index function is a slope-based function.
3. The method of claim 1, where the primary function includes a complex index function, the complex index function including
at least one term having an hematocrit error parameter, and
at least one term having a temperature error parameter.
4. The method of claim 3, where the complex index function includes a first term and a second term, where the first and the second terms are each modified by a complex index function term weighing coefficient, the first and the second terms each include an error parameter, and the error parameters are independently selected from intermediate output signal values and values external to the output signal.
5. The method of claim 1, further comprising:
converting the output signal with a conversion function including at least one reference correlation prior to determining the compensated output signal.
6. The method of claim 5, further comprising determining the at least one reference correlation with a reference instrument in a controlled environment prior to determining the analyte concentration in the sample
7. The method of claim 1, further comprising adjusting a compensation provided by the first residual function with a first weighing coefficient, where the first weighing coefficient is responsive to a compensation provided by the primary function.
8. The method of claim 7, further comprising:
determining the compensated output signal from the output signal in response to a second residual function.
9. The method of claim 8, further comprising:
adjusting a compensation provided by the second residual function with a second weighing coefficient, where the second weighing coefficient is responsive to the compensation provided by the first residual function.
10. The method of claim 1, where the primary function compensates at least 50% of the total error in the output signal.
11. The method of claim 1, where the primary function is determined from at least one controlled environment test case prior to determining the analyte concentration in the sample.
12. The method of claim 1, where the first residual function substantially compensates errors not compensated by the primary function.
13. The method of claim 1, where the first residual function compensates at least 5% of the total error in the output signal.
14. The method of claim 1, where the first residual function compensates error arising substantially from operating condition errors.
15. The method of claim 14, where the first residual function is determined from at least one self-testing test case prior to determining the analyte concentration in the sample.
16. The method of claim 1, where the first residual function is determined prior to determining the analyte concentration in the sample by a residual function determination method.
17. The method of claim 16, where the residual function determination method comprises:
selecting multiple error parameters as potential terms in the first residual function;
determining a first exclusion value for the potential terms;
applying an exclusion test responsive to the first exclusion value for the potential terms;
identifying one or more of the potential terms for exclusion from the first residual function; and
excluding one or more identified potential terms from the first residual function.
18. The method of claim 1, further comprising:
determining if a test sensor is filled more than once with the sample before the output signal is generated; and
determining the compensated output signal from a different first residual function if the test sensor is filled more than once.
19. The method of claim 1, where the sample is a whole blood sample and the analyte is glucose, and where the determining the analyte concentration in the sample from the compensated output signal reduces the slope of a correlation plot representing hematocrit sensitivity in whole blood to \xb10.4 or less when the whole blood sample has a hematocrit level from about 30% to about 55%.
20. The method of claim 1, where the analyte concentration is determined from at least a forty sample self-testing test case, where the test case has a measurement performance of at least one of
at least 85% of the determined analyte concentrations are within a \xb110% percent bias limit,
at least 95% of the determined analyte concentrations are within a \xb18% percent bias limit, and
at least 60% of the determined analyte concentrations are within a \xb15% percent bias limit.
21. The method of claim 1, where the analyte concentration is determined from at least a 5,000 sample test case, where the test case is at least one of a self-testing test case and a health care professional test case, where the test case uses test sensors from between two and 45 test sensor lots, where the test case has a measurement performance of at least one of
the determined analyte concentrations have an average percent bias standard deviation value of less than five,
at least 90% of the determined analyte concentrations are within a \xb110% percent bias, and
the determined analyte concentrations have a mean percent bias spread within about \xb112%.
22. The method of claim 1, where the analyte concentration lacks at least 60% of the total error of the output signal.
23. The method claim 1, where a mean percent bias of the analyte concentrations determined from the compensated output signal from different lots of test sensors is at least 47% less than a mean percent bias determined from the output signal for analyte concentrations determined from the different lots of test sensors.
24. The method of claim 1, further comprising reducing to \xb15% or less the difference between analyte concentrations determined from test sensors stored for four weeks at \u221220\xb0 C. and analyte concentrations determined from test sensors stored for four weeks at 50\xb0 C.
25. The method of claim 18, where 90% or more of the determined analyte concentrations are within a \xb110% percent bias limit when the test sensors are filled more than once with the sample before the output signal is generated.
26. A biosensor system, for determining an analyte concentration in a sample, comprising:
a test sensor having a sample interface in electrical communication with a reservoir formed by the test sensor; and
a measurement device having a processor connected to a sensor interface through a signal generator, the sensor interface having electrical communication with the sample interface, and the processor having electrical communication with a storage medium,
where the processor instructs the signal generator to apply an electrical input signal to the sensor interface,
where the processor determines an output signal responsive to the input signal and the concentration of the analyte in the sample from the sensor interface,
where the processor compensates at least 50% of the total error in the output signal with a primary function,
where the processor compensates at least 5% of the remaining error in the output signal with a first residual function,
where the processor determines a compensated output signal, and
where the processor determines an analyte concentration in a sample from the compensated output signal.
27-39. (canceled)
40. A method for determining an analyte concentration in a sample, comprising:
generating an output signal responsive to a concentration of an analyte in a sample and an input signal;
compensating the output signal with a primary function and a first residual function; and
determining the analyte concentration in the sample from a compensated output signal.
41-42. (canceled)
43. A method of determining a desired residual function for compensating an analyte concentration of a sample, comprising:
generating an output signal responsive to a concentration of an analyte in a sample;
selecting multiple error parameters as potential terms in a residual function, the error parameters describing at least a portion of the total error in the output signal;
determining a first exclusion value for the potential terms;
applying an exclusion test responsive to the first exclusion value for the potential terms;
identifying one or more of the potential terms for exclusion from the residual function;
excluding one or more identified potential terms from the residual function; and
determining a desired residual function.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A monitoring system for monitoring a predetermined location, comprising:
an entire image display portion for storing in a storage unit image data derived from a first camera unit capable of taking images from different imaging directions, and position information associated with each set of image data, said entire image display portion displaying either compressed images of said image data having been compressed from said first camera unit or compressed images of said image data read from said storage unit and then being compressed, at a position based on position information associated with a set of said displayed image data, with the position information of a respective set of image data being assembled therein;
a specified image display portion for deriving moving image data from a second camera unit capable of taking images from changeable directions and displaying said moving image data; and
a movement range image display portion for storing in a storage unit image data, derived from different positions from said first camera unit over all image-taking directions in a maximum movement range thereof, with position information associated with each set of said image data derived from different positions from said first camera unit over all image-taking directions in a maximum movement range thereof, said third image display portion displaying either compressed images of said image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof having been compressed from said first camera unit or compressed images of said image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof read from said storage unit and then being compressed, at a position based on associated position information, with the position information of a respective set of said image data sets derived from the first camera unit over all image-taking directions in a maximum movement range thereof being assembled therein,
wherein a predetermined range is selected with a first indicating display and superimposed on said entire image display portion, and said moving image data is derived within said predetermined range,
wherein the movement range image display portion does not display all images from the first camera unit that are within the movement range, the movement range image display portion displays only particular images within the movement range the particular images selected from the group consisting of images showing four sides of the movement range, images showing the four corners of the movement range, and images showing the four corners and center of the movement range, and
wherein the movement range image display portion, the entire image display portion, and the specified image display portion are displayed simultaneously in mutually different regions that do not overlap one another.
2. The monitoring system according to claim 1, wherein display information of a range indicated by a second indicating display superimposed on said movement range image display portion is displayed on said entire image display portion.
3. The monitoring system according to claim 2, wherein, while selection is being made with said first or second indicating displays, and during the time from said selection until starting of image-taking of said selected range, image data within said predetermined range selected with said first or second indicating displays is read out from said storage unit and displayed on said specified or entire image display portion.
4. The monitoring system according to claim 2, wherein, upon selection of an arbitrary point on said entire or movement range image display portion, said first or second indicating displays are superimposed on said entire or movement image display portion according to said selected arbitrary point.
5. A monitoring method for monitoring a predetermined location, comprising:
a step for storing in a storage unit image data, derived from a first camera unit capable of taking images from different imaging directions, and position information associated with each set of image data;
a step for displaying an entire image display portion, either compressed images of said image data having been compressed from said first camera unit or compressed images of said image data read from said storage unit and then being compressed, at a position based on position information associated with a set of said displayed image data, with the position information of a respective set of image data being assembled therein;
a step for deriving moving image data from a second camera unit capable of taking images from changeable directions;
a step for displaying said moving image data on a specified image display portion; and
a step of using a movement range image display portion for storing in a storage unit image data, taken of different positions with said first camera unit over all image-taking directions in the maximum movement range thereof, with position information attached to each set of image data taken over all image-taking directions in the maximum movement range, and displaying in the movement range image display portion either compressed images of said taken image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof having been compressed from the first camera or compressed images of said image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof stored in said storage unit having been compressed, at a position based on corresponding position information of a respective set of said set of image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof being assembled therein,
wherein a predetermined range is selected with a first indicating display and superimposed on said entire image display portion, and said moving image data is derived within said predetermined range
wherein the movement range image display portion does not display all images from the first camera unit that are within the movement range, the third image display portion displays only particular images within the movement range the particular images selected from the group consisting of images showing four sides of the movement range, images showing the four corners of the movement range, and images showing the four corners and center of the movement range, and
wherein the movement range image display portion, the entire image display portion, and the specified image display portion are displayed simultaneously in mutually different regions that do not overlap one another.
6. The monitoring system according to claim 5,
wherein an image of a range indicated by a second indicating display superimposed on said movement range image display portion is displayed on said entire image display portion.
7. The monitoring method according to claim 6, wherein, while selection is being made with said first or second indicating displays, and during the time from selection with said first or second indicating displays until starting of image-taking of said selected desired range, image data within said predetermined range selected with said first or second indicating displays is read out from said storage unit and displayed on said specified or entire image display portions.
8. The monitoring method according to claim 6, wherein, upon an arbitrary point on said entire or movement range image display portion being selected, said first or second indicating displays are superimposed on said entire movement range image display portion according to said selected arbitrary point.
9. A computer-readable medium encoded with a program for causing a computer to execute a monitoring method for monitoring a predetermined location by:
storing in a storage unit image data, derived from a first camera unit capable of taking images from different imaging directions, and position information associated with each set of image data;
displaying on an entire image display portion, either compressed images of said image data having been compressed from said first camera unit or compressed images of said image data read from said storage unit and then being compressed, at a position based on position information associated with a set of said displayed image data, with the position information of a respective set of image data being assembled therein;
deriving moving image data from a second camera unit capable of taking images from changeable directions;
displaying said moving image data on a specified image display portion; and
using a movement range image display portion for storing in a storage unit image data, taken of different positions with said first camera unit over all image-taking directions in the maximum movement range thereof, with position information attached to each set of image data taken over all image-taking directions in the maximum movement range, and displaying in the movement range image display portion either compressed images of said taken image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof having been compressed from the first camera or compressed images of said image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof stored in said storage unit having been compressed, at a position based on corresponding position information of a respective set of said set of image data derived from the first camera unit over all image-taking directions in a maximum movement range thereof being assembled therein,
wherein a predetermined range is selected with a first indicating display and superimposed on said entire image display portion, and said moving image data is derived within said predetermined range,
wherein the movement range image display portion does not display all images from the first camera unit that are within the movement range, the movement range image display portion displays only particular images within the movement range the particular images selected from the group consisting of images showing four sides of the movement range, images showing the four corners of the movement range, and images showing the four corners and center of the movement range, and
wherein the movement range image display portion, the entire image display portion, and the specified image display portion are displayed simultaneously in mutually different regions that do not overlap one another.

1. A networked device comprising:
means for controlling a state of the networked device;
means for connecting to a network;
means for allowing a user to select a color from a plurality of colors, the plurality of colors having at least one locking color and one or more non-locking colors; and
means for generating a selected color code corresponding to the color selected by the user, each color of the plurality of colors having a corresponding color code; wherein
the means for connecting to the network sends the selected color code over the network; and
the means for controlling the state of the networked device changes the state of the networked device in response to a message from the network only if the color selected by the user is one of the one or more non-locking colors.
2. The networked device of claim 1 in which the means for controlling the state of the networked device controls an OnOff state of the networked device.
3. The networked device of claim 1 in which the networked device responds to a request for status information from the network independent of the color selected by the user.
4. The networked device of claim 1 further comprising:
means for allowing the user enter a local control command; wherein
the means for controlling the state of the networked device changes the state of the networked device in response to the local control command only if the color selected by the user is one of the one or more non-locking colors.
5. The networked device of claim 4 in which the means for controlling the state of the networked device controls an OnOff state of the networked device.
6. A networked device comprising:
a controller;
a network adapter communicatively coupled to the controller; and
a color selection mechanism communicatively coupled to the controller, the color selection mechanism allowing a user to select a color from a plurality of colors, the plurality of colors having at least one locking color and one or more non-locking colors; wherein
the color selection mechanism communicates information corresponding to the color selected by the user to the controller;
the controller converts the information communicated by the color selection mechanism to a color code corresponding to the color selected by the user,
the controller communicates the color code to the network adapter,
the network adapter sends the color code out over a network,
the network adapter receives a message from the network to change a state of the networked device and communicates it to the controller, and
the controller changes the state of the networked device in response to the message to change the state of the networked device communicated by the network adapter only if the color selected by the user is one of the one or more non-locking colors.
7. The networked device of claim 6 in which the network utilizes communication over an AC power line.
8. The networked device of claim 6 in which the network utilizes radio frequency communication.
9. The networked device of claim 6 in which the controller and the network adapter are integrated on a single integrated circuit.
10. The networked device of claim 6 in which the state of the networked device being controlled is an OnOff state of the networked device.
11. The networked device of claim 6 in which
the network adapter receives a status request message over the network and communicates it to the controller; and
the controller responds to the status request message by communicating a response message to the network adapter to send out over the network, the controller responding independent of the color selected by the user.
12. The networked device of claim 6 further comprising:
a local control interface communicatively coupled to the controller, the local control interface allowing the user to enter a local control command to request a change to the state of the networked device; wherein
the controller changes the state of the networked device in response to the local control command only if the color selected by the user is one of the one or more non-locking colors.
13. The networked device of claim 12 in which the state of the networked device to which the local control command requests a change is an OnOff state of the networked device.
14. The networked device of claim 6 in which the color selection mechanism is a graphical user interface.
15. The networked device of claim 6, the color selection mechanism comprising:
an electrical component with a rotatable shaft and an output communicatively coupled to the controller; and
a color wheel having a center, an edge and a colored area, the center of the color wheel coupled to the rotatable shaft of the electrical component and the colored area divided into sections, each section imprinted with a section color selected from the plurality of colors; such that
as the color wheel is rotated by user manipulation of the edge, the colored area of the color wheel and the rotatable shaft of the electrical component also rotate; and
the output of the electrical component with a rotatable shaft communicates current rotational position information corresponding to the color selected by the user to the controller.
16. The networked device of claim 15 wherein the electrical component with a rotatable shaft is a rotary switch.
17. The networked device of claim 15 wherein the electrical component with a rotatable shaft is a potentiometer and the controller further comprising an analog to digital converter, the input of the analog to digital converter electrically connected to a voltage divider circuit that changes as the shaft of the potentiometer rotates.
18. The networked device of claim 15, the color selection mechanism further comprising:
a selection mark in close physical proximity to the section of the colored area of the color wheel imprinted with the section color corresponding to the color selected by the user at the current rotational position.
19. The networked device of claim 15 further comprising an outer housing with an aperture; wherein
the color wheel is mounted in the networked device so that,
a portion of the edge of the color wheel protrudes from the outer housing of the networked device, whereby the user is able to manipulate the edge to rotate the color wheel about its center;
a portion of the colored area is visible through the aperture in the outer housing of the networked device; and
a majority of the portion of the colored area visible through the aperture in the outer housing of the networked device is the section of the colored area imprinted with the section color corresponding to the color code selected by the user at the current rotational position.
20. The networked device of claim 15 in which at least one section of the colored area is also imprinted with a visible symbol.
21. The networked device of claim 15 in which at least one section of the colored area has a tactilely recognizable symbol.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A method for controlling a portable media device using an accessory, the method comprising, by the accessory:
providing configuration information to a portable media device;
receiving from the portable media device a first image signal that specifies a first graphical user interface image;
displaying the first graphical user interface image on a display device of the accessory;
detecting user operation of an input control of the accessory;
sending to the portable media device an input signal indicating that the input control was operated;
receiving from the portable media device a second image signal that specifies a second graphical user interface image to be displayed, the second graphical user interface image reflecting the operation of the input control; and
displaying the second graphical user interface image on the display device of the accessory.
2. The method of claim 1 wherein the configuration information includes a parameter indicating a characteristic of the display device of the accessory, the characteristic including one or more of a display size characteristic, a color depth characteristic, a refresh rate characteristic, or a display input format characteristic.
3. The method of claim 1 wherein the configuration information includes a parameter indicating a characteristic of the input control of the accessory, the characteristic including a type of the input control.
4. The method of claim 1 wherein the configuration information includes a parameter indicating a number of input controls present on the accessory.
5. The method of claim 1 wherein the configuration information includes an accessory identifier, the accessory identifier being usable by the portable media device to determine one or more characteristics of the display device of the accessory.
6. The method of claim 1 wherein the configuration information includes an accessory identifier, the accessory identifier being usable by the portable media device to determine one or more characteristics of the user input control of the accessory.
7. The method of claim 1 further comprising, by the accessory:
providing environment information to the portable media device, the environment information indicating an operating environment of the accessory.
8. The method of claim 1 further comprising, by the accessory:
providing status information to the portable media device, the status information indicating an operational status of a system in which the accessory is installed.
9. The method of claim 8 wherein the system is an automobile and the status information indicates whether the automobile is in a parked state.
10. The method of claim 8 wherein the system is an automobile and the status information includes information about a current speed of the automobile.
11. The method of claim 8 wherein the system is an automobile and the status information indicates whether the automobile is in a daytime or nighttime driving mode.
12. The method of claim 8 wherein the system is an exercise machine and the status information indicates whether a workout is presently in progress.
13. The method of claim 12 further comprising, by the accessory:
in the event that a workout is in progress, providing to the portable media device further status information including data about the workout.
14. The method of claim 1 further comprising, by the accessory:
providing to the portable media device an image element,
wherein the image element is included by the portable media device in the first graphical user interface image.
15. An accessory for providing an interface to a portable media device, the accessory comprising:
a display configured to display an image in response to a video signal received from the portable media device;
a user-operable input control configured to generate an input signal in response to user operation of the control;
an interface configured to communicate with a portable media device; and
a controller coupled to the display, the user operable input control, and the interface,
the controller being configured to receive an image signal defining a first graphical user interface image from the portable media device via the interface; to display the first graphical user interface image on the display, to receive a control signal from the user operable input control indicating a user operation, and to communicate the control signal to the portable media device via the interface.
16. The accessory of claim 15 wherein the user operable input control includes a touch screen overlay on the display.
17. The accessory of claim 15 wherein the user operable input control includes at least one button.
18. The accessory of claim 15 wherein the user operable input control includes at least one knob.
19. The accessory of claim 15 wherein the image signal comprises an analog video signal.
20. The accessory of claim 15 wherein the image signal comprises a digital video signal.
21. The accessory of claim 15 wherein the controller is further configured to send a user interface parameter to the portable media device and wherein the user interface image is based at least in part on the user interface parameter.
22. The accessory of claim 21 wherein the user interface parameter defines a characteristic of the display, the characteristic being one of a group of characteristics consisting of a display size, a color depth, a refresh rate, and a display input format.
23. The accessory of claim 21 wherein the user interface parameter defines a characteristic of the input control, the characteristic being one of a group of characteristics consisting of a number of input controls and a type of the input control.
24. The accessory of claim 15 wherein the controller is further configured to send accessory identification information to the portable media device and wherein the user interface image is based at least in part on the accessory identification information.
25. The accessory of claim 15 wherein the controller is further configured to send environment information to the portable media device.
26. The accessory of claim 15 wherein the interface is further configured to receive media content from the portable media device.
27. The accessory of claim 26 wherein the controller is further configured to deliver a video portion of the received media content to the display.
28. The accessory of claim 26 wherein the controller is further configured to deliver an audio portion of the received media content to a speaker system.
29. The accessory of claim 15 wherein the controller is further configured to deliver to the portable media device an image element to be incorporated into the user interface image.
30. The accessory of claim 15 wherein the controller is further configured to display the first graphical image in a first portion of the display and to display a different image in a second portion of the display device.
31. A media system comprising:
an audio device configured to produce sound;
a display configured to display images;
a user-operable input control configured to generate an input signal in response to user operation of the control;
an interface configured to communicate with a portable media device; and
a controller coupled to the audio device, the display, the user operable input control, and the interface,
the controller being configured to operate the audio device and the display to play media content delivered from the portable media device via the interface,
the controller being further configured to receive an image signal defining a first graphical user interface image from the portable media device via the interface; to display the first graphical user interface image on the display, to receive a control signal from the user operable input control indicating a user operation, and to communicate the control signal to the portable media device via the interface.
32. The media system of claim 31 wherein the media system is installed in an automobile.
33. The media system of claim 31 wherein the media system is installed in an exercise machine.
34. The media system of claim 31 wherein the media system is a home entertainment system.
35. The media system of claim 31 wherein the media system is an in-flight entertainment system for an airplane.
36. A method for controlling a portable media device using an accessory, the method comprising, by the portable media device:
receiving configuration information from the accessory;
based in part on the configuration information, generating a first graphical user interface image;
sending to the accessory a first image signal that specifies the first graphical user interface image, wherein the accessory displays the first graphical user interface image on a display device of the accessory in response to the first image signal;
receiving from the accessory an input signal indicating that a user input control of the accessory was operated;
based in part on the input signal, generating a second graphical user interface image; and
sending to the accessory a second image signal that specifies the second graphical user interface image, wherein the accessory displays the second graphical user interface image on a display device of the accessory in response to the second image signal.
37. The method of claim 36 further comprising, by the portable media device:
interpreting the input signal to determine a corresponding media device operation to be performed; and
performing the media device operation.
38. The method of claim 36 wherein the configuration information includes a parameter indicating a characteristic of the display device of the accessory, the characteristic including one or more of a display size characteristic, a color depth characteristic, a refresh rate characteristic, or a display input format characteristic.
39. The method of claim 36 wherein the configuration information includes a parameter indicating a characteristic of the input control of the accessory, the characteristic including a type of the input control.
40. The method of claim 36 wherein the configuration information includes a parameter indicating a number of input controls present on the accessory.
41. The method of claim 36 wherein the configuration information includes an accessory identifier, the accessory identifier being usable by the portable media device to determine one or more characteristics of the display device of the accessory.
42. The method of claim 36 wherein the configuration information includes an accessory identifier, the accessory identifier being usable by the portable media device to determine one or more characteristics of the user input control of the accessory.
43. The method of claim 36 further comprising:
receiving environment information from the accessory, the environment information indicating an operating environment of the accessory; and
determining at least one property of the first graphical user interface image based on the environment information.
44. The method of claim 36 further comprising:
receiving status information from the accessory, the environment information indicating an operational status of a system in which the accessory is installed; and
determining at least one property of the first graphical user interface image based on the status information.
45. The method of claim 36 further comprising, by the portable media device:
receiving from the accessory an image element; and
including the image element in the first graphical user interface image.
46. A portable media device for use with an accessory, the portable media device comprising:
a native user interface including a display and a user input control device;
an accessory interface configured to communicate with an accessory; and
a processor coupled to the native user interface and the accessory interface,
the processor being configured to provide a graphical user interface image to the accessory via the accessory interface; to receive a control signal from the accessory via the accessory interface, the control signal indicating operation of an input control of the accessory in response to the graphical user interface image; and to perform a media device operation in response to the control signal.
47. The portable media device of claim 46 wherein the graphical user interface image replicates at least a portion of the native user interface.
48. The portable media device of claim 46 wherein the accessory interface includes an analog video path configured to deliver analog video signals and wherein the processor is further configured to provide the graphical user interface image as an analog video signal.
49. The portable media device of claim 46 wherein the control signal identifies one of a plurality of input controls of the accessory as having been operated by a user.
50. The portable media device of claim 46 wherein the control signal identifies a portion of a touchscreen input control of the accessory as having been touched by a user.
51. The portable media device of claim 46 wherein the processor is further configured to receive from the accessory, via the accessory interface, accessory configuration information and to generate the graphical user interface image based at least in part on the accessory configuration information.
52. The portable media device of claim 51 wherein the accessory configuration information includes a parameter indicating a characteristic of the display device of the accessory, the characteristic including one or more of a display size characteristic, a color depth characteristic, a refresh rate characteristic, or a display input format characteristic.
53. The portable media device of claim 51 wherein the accessory configuration information includes a parameter indicating a characteristic of the input control of the accessory, the characteristic including a type of the input control.
54. The portable media device of claim 51 wherein the accessory configuration information includes a parameter indicating a number of input controls present on the accessory.
55. The portable media device of claim 51 wherein the accessory configuration information includes an accessory identifier and wherein the processor is further configured to determine one or more characteristics of the display device of the accessory based on the accessory identifier.
56. The portable media device of claim 51 wherein the configuration information includes an accessory identifier and wherein the processor is further configured to determine one or more characteristics of the user input control of the accessory base don the accessory identifier.
57. The portable media device of claim 46 wherein the processor is further configured to receive environment information from the accessory via the accessory interface, the environment information indicating an operating environment of the accessory, and to determine at least one property of the graphical user interface image based on the environment information.
58. The portable media device of claim 46 wherein the processor is further configured to receive status information from the accessory via the accessory interface, the environment information indicating an operational status of a system in which the accessory is installed, and to determine at least one property of the graphical user interface image based on the status information.
59. The portable media device of claim 46 wherein the processor is further configured to receive an image element from the accessory via the accessory interface and to include the image element in the graphical user interface image.