1. A transmissionreception system, comprising:
a providing apparatus; and
a recording apparatus;
the providing apparatus including
a generating section configured to generate, as attribute information associated with each piece of content to be broadcast, restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed, and
a providing section configured to provide the restrictive information with each piece of the content by broadcasting to the recording apparatus that records each piece of the content to an internal recording media and copies the recorded content, and
the recording apparatus including
a management section configured to manage the restrictive information recorded to the internal recording media, and
a restriction section configured to add, every time each piece of the content recorded to the internal recording media is copied within a range of the copyable count specified by the first attribute, the restriction specified by the second attribute to at least one of a next copying of substantially the same content as copied last or each piece of the content recorded to the internal recording media that provided a source of the copying.
2. A recording apparatus for recording content to be broadcast to an internal recording media and copying the recorded content, comprising:
a management section configured to manage restrictive information to be obtained as attribute information associated with content recorded to the internal recording media, the restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed; and
a restriction section configured to add, every time the content recorded to the internal recording media is copied within a range of the copyable count specified by the first attribute, a restriction specified by the second attribute to at least one of a next copying of substantially the same content as copied last or the content recorded to the internal recording media that provided a source of the copying.
3. The recording apparatus according to claim 2, wherein the restriction section sets an interval until a next copy is enabled to add a restriction to the next copy of substantially the same content as copied last.
4. The recording apparatus according to claim 2, wherein the restriction section adds a restriction to a next copy of substantially the same content as copied last by lowering an image quality of the next copy.
5. The recording apparatus according to claim 2, wherein the restriction section adds a restriction to the content recorded to the internal recording media that provided a source of the copying by setting a time interval in which the content can be recorded.
6. A recording method for recording content to be broadcast to an internal recording media and for copying the recorded content, the method comprising:
managing restrictive information to be obtained as attribute information associated with content recorded to the internal recording media, the restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed; and
adding, every time the content recorded to the internal recording media is copied within a range of the copyable count specified by the first attribute, a restriction specified by the second attribute to at least one of a next copying of substantially the same content as copied last or the content recorded to the internal recording media that provided a source of the copying.
7. A program for causing a computer to execute a method for recording content to be broadcast to an internal recording media and for copying the recorded content, the method comprising:
managing restrictive information to be obtained as attribute information associated with content recorded to the internal recording media, the restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed; and
adding, every time the content recorded to the internal recording media is copied within a range of the copyable count specified by the first attribute, a restriction specified by the second attribute to at least one of a next copying of substantially the same content as copied last or the content recorded to the internal recording media that provided a source of the copying.
8. A providing apparatus, comprising:
a generating section configured to generate, as attribute information associated with each piece of content to be broadcast, restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed; and
a providing section configured to provide the restrictive information with each piece of the content by broadcasting to a recording apparatus that records each piece of the content to be broadcast to an internal recording media and copies the recorded content.
9. A providing method, comprising:
generating, as attribute information associated with each piece of content to be broadcast, restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed; and
providing the restrictive information with each piece of the content by broadcasting to a recording apparatus that records each piece of the content to be broadcast to an internal recording media and copies the recorded content.
10. A program for causing a computer to execute a providing method, the method comprising:
generating, as attribute information associated with each piece of content to be broadcast, restrictive information including a first attribute for specifying a copyable count and a second attribute for specifying a restriction to be added every time copying is executed; and
providing the restrictive information with each piece of the content by broadcasting to a recording apparatus that records each piece of the content to be broadcast to an internal recording media and copies the recorded content.
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. An apparatus for measuring the speed of a moving object, the apparatus comprising:
accelerometers for measuring a first acceleration along a moving direction of the moving object and a second acceleration along a lateral direction of the moving object;
gyroscopes for measuring a first angular speed along the lateral direction of the moving object and a second angular speed along a lower direction of the moving object;
a roll angle calculator for calculating a roll angle of the moving object using the first acceleration, the second angular speed, a previous speed of the moving object in the moving direction of the moving object, and a previous road inclination angle with respect to the moving direction of the moving object;
an inclination angle calculator for calculating a road inclination angle using the calculated roll angle, the first angular speed, and the second angular speed; and
a speed calculator for calculating a pure motion acceleration in the moving direction of the moving object using the calculated road inclination angle and for calculating the speed of the moving object using the pure motion acceleration of the moving object.
2. The apparatus of claim 1, further comprising a data storage unit for storing the calculated road inclination angle and the calculated speed in the moving direction of the moving object and for providing the previous road inclination angle and the previous speed in the moving direction of the moving object to the roll angle calculator.
3. The apparatus of claim 1, wherein the roll angle calculator uses predetermined initial values in the absence of either the previous speed in the moving direction of the moving object or the previous road inclination angle with respect to the moving direction of the moving object.
4. The apparatus of claim 1, wherein the roll angle calculator arranges an equation for the first acceleration to an equation for the roll angle of the moving object and substitutes the second acceleration, the second angular speed, the previous speed in the moving direction of the moving object, and the previous road inclination with respect to the moving direction of the moving object into the equation for the roll angle of the moving object, thereby calculating the roll angle of the moving object.
5. The apparatus of claim 1, wherein the roll angle calculator calculates a gravitational acceleration component included in the first acceleration using the road inclination angle and subtracts the gravitational acceleration component from the first acceleration, thereby calculating the pure motion acceleration in the moving direction of the moving object.
6. The apparatus of claim 1, wherein the first and second accelerations are two axis accelerations.
7. A method for measuring the speed of a moving object, the method comprising the steps of:
measuring a first acceleration along a moving direction of the moving object and a second acceleration along a lateral direction of the moving object;
measuring a first angular speed along the lateral direction of the moving object and a second angular speed along a lower direction of the moving object;
calculating a roll angle of the moving object using the first acceleration, the second angular speed, a previous speed of the moving object in the moving direction of the moving object, and a previous road inclination angle with respect to the moving direction of the moving object;
calculating a road inclination angle using the calculated roll angle, the first angular speed, and the second angular speed; and
calculating a pure motion acceleration in the moving direction of the moving object using the calculated road inclination angle and calculating the speed of the moving object using the pure motion acceleration of the moving object.
8. The method of claim 7, further comprising storing the calculated road inclination angle and the calculated speed in the moving direction of the moving object.
9. The method of claim 7, further comprising calculating the roll angle of the moving object using predetermined initial values if there is neither the previous speed in the moving direction of the moving object nor the previous road inclination angle.
10. The method of claim 7, wherein the step of calculating the roll angle of the moving object comprises:
arranging an equation for the first acceleration to an equation for the roll angle of the moving object;
acquiring the second acceleration, the second angular speed, the previous speed in the moving direction of the moving object, and the previous road inclination with respect to the moving direction of the moving object; and
substituting the second acceleration, the second angular speed, the previous speed in the moving direction of the moving object, and the previous road inclination with respect to the moving direction of the moving object into the equation for the roll angle of the moving object, thereby calculating the roll angle of the moving object.
11. The method of claim 7, wherein the step of acquiring the pure motion acceleration in the moving direction of the moving object comprises:
acquiring a gravitational acceleration component included in the first acceleration using the road inclination angle; and
subtracting the gravitational acceleration component from the first acceleration, thereby calculating the pure motion acceleration in the moving direction of the moving object.