1. A method for providing a crypto key and an associated checkword of said crypto key to an encryption device for a telemeter system of a missile, said method comprising the method steps of:
(a) generating said crypto key and said associated checkword wherein a key loader generates said crypto key and said associated checkword;
(b) transferring said crypto key and said associated check word from said key loader to a microcontroller having a memory for a duplication and a storage of said crypto key and said associated check word within said memory;
(c) disabling a transmitter connected to said microcontroller when the transfer of said crypto key and said associated check word to said microcontroller occurs to prevent a transmission of said crypto key and said associated check word by said transmitter;
(d) duplicating said crypto key and said associated check word within said microcontroller to provide a duplicate of said crypto key and a duplicate of said associated check word;
(e) storing said crypto key, said associated check word, the duplicate of said crypto key and the duplicate of said associated check word in the memory of said microcontroller;
(f) enabling said transmitter after the storage of said crypto key and said associated check word within the memory of said microcontroller;
(g) disabling said transmitter prior to a load of said crypto key and said associated check word into said encryption device;
(h) loading said crypto key and said associated check word from the memory of said microcontroller into said encryption device wherein said crypto key when loaded into said encryption device provides for encryption of telemetry data transmitted to a ground station by the telemetry system of said missile;
(i) enabling said transmitter after the load of said crypto key and said associated check word into said encryption device;
(j) erasing said crypto key and said associated check word from the memory of said encryption device upon a launch of said missile to prevent an enemy force from retrieving said crypto key and said associated check word from the missile after the launch of said missile; and
(k) providing a computer software program executable by said microcontroller to perform the method steps of:
(i) transferring said crypto key and said associated checkword from said key loader to said microcontroller;
(ii) disabling said transmitter when the transfer of said crypto key and said associated check word to said microcontroller occurs;
(iii) duplicating said crypto key and said associated check word within said microcontroller:
(iv) storing said crypto key, said associated check word, the duplicate of said crypto key and the duplicate of said associated check word in the memory of said microcontroller:
(v) loading said crypto key and said associated check word from the memory of said microcontroller into said encryption device;
(vi) enabling said transmitter after the load of said crypto key and said associated check word into said encryption device; and
(vii) erasing said crypto key and said associated check word from the memory of said encryption device upon a launch of said missile.
2. The method of claim 1 comprising the additional method step of loading the duplicate of said crypto key and the duplicate of said check word into said encryption device when said encryption device rejects said crypto key wherein said computer software program is executable by said microcontroller to perform the additional method step of loading the duplicate of said crypto key and the duplicate of said check word into said encryption device when said encryption device rejects said crypto key.
3. The method of claim 1 comprising the additional method step of indicating a status of a store of said crypto key and said associated check word into the memory of said microcontroller wherein said computer software program is executable by said microcontroller to perform the additional method step of indicating the status of the store of said crypto key and said associated check word into the memory of said microcontroller.
4. The method of claim 3 wherein the status of the store of said crypto key and said associated check word into the memory of said microcontroller is indicated by a light emitting diode connected to said microcontroller.
5. The method of claim 1 comprising the additional method step of indicating a status of an erase of said crypto key and said associated check word from the memory of said microcontroller wherein said computer software program is executable by said microcontroller to perform the additional method step of indicating the status of the erase of said crypto key and said associated check word from the memory of said microcontroller.
6. The method of claim 5 wherein the status of the erase of said crypto key and said associated check word from the memory of said microcontroller is indicated by a light emitting diode connected to said microcontroller.
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 video switching system operable to switch video images of a plurality of participants in a video conference, the video switching system comprising:
a storage system;
at least one processor;
one or more programs that are stored in the storage system and are executed by the at least one processor, the one or more programs comprising:
a detecting module operable to detect speaking information of at least one speaker in the video conference according to a reference time, wherein one participant is regarded as one speaker if the one participant speaks longer than the reference time;
a main speaker determining module operable to determine a main speaker of the at least one speaker according to the speaking information of the at least one speaker;
a calculating module operable to calculate an image switching frequency of the video conference, wherein the image switching frequency is a number of times that the video images of the video conference have been switched per unit time;
a switching module operable to determine whether to switch to a video image of the main speaker according to the image switching frequency, wherein the calculating module further calculates a response time when the switching module determines to switch to the video image of the main speaker, where the response time is a time difference between a time point of the main speaker starting to speak and a time point of the switching module determining to switch to the video image of the main speaker;
an adjusting module operable to adjust the reference time according to the image switching frequency and the response time;
wherein the adjusting module increases the reference time by a value of a sensitivity adjusting unit * the image switching frequency a switching standard value when the image switching frequency is greater than the switching standard value, and decreases the reference time by the value of the sensitivity adjusting unit * the response time a response standard value when the response time is greater than the response standard value.
2. The video switching system of claim 1, wherein the main speaker determining module comprises:
a priority setting sub-module operable to set at least one priority order for the at least one speaker according to the speaking information of the at least one speaker; and
a determining sub-module operable to determine whether a number of the at least one speaker is equal to one, and determine whether the at least one priority order of each of the at least one speaker is equivalent upon the condition that the number of the at least one speaker is greater than one.
3. The video switching system of claim 2, wherein:
when the number of the at least one speaker equals is equal to one, the determining sub-module determines that the only one speaker is the main speaker;
when the at least one priority order of each of the at least one speaker is equivalent, the determining sub-module determines that one speaker speaking for the longest time is the main speaker; and
when the at least one priority order of each of the at least one speaker is not equivalent, the determining sub-module determines that one speaker with the highest priority order is the main speaker.
4. The video switching system of claim 1, wherein the switching module is operable to determine not to switch to the video image of the main speaker upon the condition that the image switching frequency is greater than the switching standard value, and determine to switch to the video image of the main speaker upon the condition that the image switching frequency is not greater than the switching standard value.
5. The video switching system of claim 4, wherein the adjusting module increases the reference time upon the condition that the image switching frequency is greater than the switching standard value, and decreases the reference time upon the condition that the response time is greater than the response standard value.
6. A video switching method for switching video images of a plurality of participants in a video conference, the video switching method comprising:
detecting speaking information of at least one speaker in the video conference according to a reference time, wherein one participant is regarded as one speaker if the one participant speaks longer than the reference time;
determining a main speaker of the at least one speaker according to the speaking information of the at least one speaker;
calculating an image switching frequency of the video conference, wherein the image switching frequency is a number of times that the video images of the video conference have been switched per unit time;
determining whether to switch to a video image of the main speaker according to the image switching frequency;
calculating a response time if determining to switch to the video image of the main speaker, wherein the response time is a time difference between a time point of the main speaker starting to speak and a time point of determining to switch to the video image of the main speaker;
adjusting the reference time according to the image switching frequency and the response time; and
providing at least one processor executing the above steps;
wherein the step of adjusting the reference time according to the image switching frequency and the response time comprises:
increasing the reference time by a value of a sensitivity adjusting unit * the image switching frequency a switching standard value if the image switching frequency is greater than the switching standard value; and
decreasing the reference time by the value of the sensitivity adjusting unit * the response time a response standard value if the response time is greater than the response standard value.
7. The video switching method of claim 6, wherein the step of determining a main speaker of the at least one speaker according to the speaking information of the at least one speaker comprises:
setting at least one priority order for the at least one speaker according to the speaking information of the at least one speaker;
determining whether a number of the at least one speaker equals is equal to one; and
determining whether the at least one priority order of each of the at least one speaker is equivalent if the number of the at least one speaker is greater than one.
8. The video switching method of claim 7, wherein the step of determining a main speaker of the at least one speaker according to the speaking information of the at least one speaker comprises:
determining that the only one speaker is the main speaker if the number of the at least one speaker is equal to one;
determining that one speaker speaking for the longest time is the main speaker if the at least one priority order of each of the at least one speaker is equivalent; and
determining that one speaker with the highest priority order is the main speaker if the at least one priority order of each of the at least one speaker is not equivalent.
9. The video switching method of claim 6, wherein the step of determining whether to switch to a video image of the main speaker comprises:
determining not to switch to the video image of the main speaker if the image switching frequency is greater than the switching standard value; and
determining to switch to the video image of the main speaker if the image switching frequency is not greater than the switching standard value.
10. The video switching method of claim 9, wherein the step of adjusting the reference time according to the image switching frequency and the response time comprises:
increasing the reference time if the image switching frequency is greater than the switching standard value; and
decreasing the reference time if the response time is greater than the response standard value.