Device and method for reproducing sound and motion picture
First Claim
1. A reproducing apparatus which synchronously reproduces motion picture data and sound data provided separately from each other, comprising:
- a motion picture reproducing unit; and
a sound reproducing unit, wherein;
said motion picture reproducing unit comprises;
a motion picture decoder for decoding said motion picture data; and
a display control unit which converts the motion picture data decoded by said motion picture decoder into an image signal for a display unit, and outputs the image signal to said display unit;
said sound reproducing unit comprises;
a sound decoder which decodes said sound data;
a data buffer which stores the sound data decoded by said sound decoder; and
a sound conversion means which converts the decoded sound data stored in said buffer into a sound signal for a sound device, and outputs the sound signal to said sound device;
said display control means asserts a synchronous reproducing start signal according to output of said image signal corresponding to a top frame of said motion picture data; and
said sound conversion means starts output of said sound signal according to assertion of said synchronous reproducing start signal.
1 Assignment
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Accused Products
Abstract
A reproducing apparatus is provided. According to that reproducing apparatus, separately provided sound data and motion picture data coincide with each other in reproducing start timing with smaller discrepancy than the conventional techniques.
The reproducing apparatus 1 synchronously reproduces separately provided motion picture data and sound data, comprising a motion picture reproducing unit 40 and a sound reproducing unit 50. The motion picture reproducing unit 50 includes a motion picture decoder 42 which decodes the motion picture data and a display control unit 44 which converts the motion picture data decoded by the motion picture decoder into an image signal for a display unit, to output the image signal to the display unit 60. The sound reproducing unit 50 includes a sound decoder 52 which decodes the sound data, a PCM data buffer 53 which stores the sound data decoded by the sound decoder 52, and a digital-analog converter 54 which converts the decoded sound data stored in the data buffer into a sound signal for a speaker, to output the sound signal to the speaker 71.
14 Citations
13 Claims
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1. A reproducing apparatus which synchronously reproduces motion picture data and sound data provided separately from each other, comprising:
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a motion picture reproducing unit; and
a sound reproducing unit, wherein;
said motion picture reproducing unit comprises;
a motion picture decoder for decoding said motion picture data; and
a display control unit which converts the motion picture data decoded by said motion picture decoder into an image signal for a display unit, and outputs the image signal to said display unit;
said sound reproducing unit comprises;
a sound decoder which decodes said sound data;
a data buffer which stores the sound data decoded by said sound decoder; and
a sound conversion means which converts the decoded sound data stored in said buffer into a sound signal for a sound device, and outputs the sound signal to said sound device;
said display control means asserts a synchronous reproducing start signal according to output of said image signal corresponding to a top frame of said motion picture data; and
said sound conversion means starts output of said sound signal according to assertion of said synchronous reproducing start signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A reproducing apparatus for reproducing a content having motion picture data and sound data provided separately from each other, comprising:
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a motion picture reproducing unit;
a sound reproducing unit; and
a communication unit;
wherein;
said communication unit comprises;
a license key obtaining means which sends identification information of a content to a content providing device through a network, to obtain a sound license key of sound data and a motion picture license key of motion picture data from said content providing device; and
a license key storing means which stores the sound license key and the motion picture license key obtained by said license key obtaining means;
said motion picture reproducing unit comprises;
a motion picture decryptor which decrypts encrypted motion picture data by using the motion picture license key stored in said license key storing means;
a motion picture decoder which decodes the motion picture data decrypted by said motion picture decryptor; and
a display control means which converts the motion picture data decoded by said motion picture decoder into an image signal for a display unit, and outputs the image signal to said display unit; and
said sound reproducing unit comprises;
a sound decryptor which decrypts encrypted sound data by using the sound license key stored in said license key storing means;
a sound decoder which decodes the sound data decrypted by said sound decryptor;
and a sound conversion means which converts the sound data decoded by said sound decoder into a sound signal for a sound device, and outputs the sound signal to said sound device. - View Dependent Claims (9, 10, 11)
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12. A reproducing method for synchronously reproducing motion picture data and sound data provided separately from each other, comprising:
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a step in which said motion picture data are decoded, the decoded motion picture data are converted into an image signal for a display unit and outputted to said display unit, and said sound data are decode, the decoded sound data are stored into a data buffer, and the decoded and stored sound data are converted into a sound signal for a sound device and outputted to said sound device;
wherein;
in said step, a synchronous reproducing start signal is asserted at a time of outputting said image signal corresponding to a top frame of the motion picture data, and output of said sound signal is started according to assertion of said synchronous reproducing start signal.
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13. A reproducing method for reproducing a content having motion picture data and sound data provided separately from each other, comprising:
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a step of sending identification information of the content to a content providing device through a network, and obtaining a sound license key of the sound data and a motion picture license key of the motion picture data from said content providing device, with said sound data and said motion picture data being constituents of said content;
a step of storing said sound obtained license key and motion picture license key;
a step of decrypting encrypted motion picture data by using said stored motion picture license key, decoding said decrypted motion picture data, and converting said decoded motion picture data into an image signal for a display unit to output the image signal to said display unit, and decrypting encrypted sound data by using said stored sound license key, decoding said decrypted sound data, and converting said decoded sound data into a sound signal for a sound device to output the sound signal to said sound device.
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Specification