Audio coding method and apparatus with variable audio data sampling rate
AssigneeNEC Corporation
InventorNobuyuki Tanaka
Life of this patent
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Abstract
An audio data input together with a motion picture data is digitized by an A/D converter portion 11 and the digital data from the A/D converter portion 11 is sampled by a sampling portion 12. The sampled data is compressed by a compressing/coding portion 13. In this construction, a sampling frequency of the sampling portion 12 is variably set by a sampling frequency control portion 14 correspondingly to a scene represented by the motion picture data Thus, in coding and compressing the motion picture data and the audio data, the audio data can be effectively compressed at a variable compression rate.
Claims10
A method of coding audio data associated with motion picture data by compressing the audio data, the method comprising:
- sampling the audio data at an adjustable sampling frequency;
- performing a compression process on the sampled audio data;
- and
- adjusting the sampling frequency for the audio data according to variations of the motion picture data.
A coding device for audio data associated with motion picture data comprising:
- a variable frequency sampling unit which samples an audio data input;
- a coding unit which compresses the sampled audio data;
- and
- a control unit which sets the sampling frequency of the sampling unit according to a scene represented by the motion picture data.
Dependencies are inferred from the claim text.