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Encoding device, encoding method, decoding device, decoding method, and program

A technology of an encoding device and a decoding device, applied in the field of encoding devices, can solve problems such as poor audio and sound quality, and achieve the effect of reducing the bit rate

Inactive Publication Date: 2011-12-07
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the sound quality of the audio corresponding to the decoding result of bitstream C[J] is poor compared to the audio corresponding to the decoding result of bitstream B[J]

Method used

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  • Encoding device, encoding method, decoding device, decoding method, and program
  • Encoding device, encoding method, decoding device, decoding method, and program
  • Encoding device, encoding method, decoding device, decoding method, and program

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Embodiment

[0093] Example of a configuration of an embodiment of an encoding device

[0094] Figure 10 is a block diagram showing an example of the configuration of an embodiment of an encoding device to which the present invention is applied.

[0095] Figure 10 The encoding device 100 includes an MDCT unit 101 , a saving unit 102 , a normalization unit 103 , a quantization unit 104 , an encoding unit 105 , a quantization unit 106 , an encoding unit 107 and a multiplexing unit 108 .

[0096] The audio PCM signal T is input to the MDCT unit 101 of the encoding device 100 as the PCM signal T[J+1] for each frame.

[0097] The MDCT unit 101 performs windowing of the window function W[J+1] on the audio PCM signal T[J+1] as a time-domain signal, performs MDCT on the PCM signal [J+1] thus obtained, and obtains Spectrum S[J+1] of domain signal. The MDCT unit 101 supplies the spectrum S[J+1] to the saving unit 102 and the normalization unit 103 .

[0098] When the spectrum S[J+1] is suppli...

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Abstract

The present invention relates to an encoding device, an encoding method, a decoding device, a decoding method and a program. An encoding device, comprising: a generating unit configured to generate first encoding information for first encoding of a first audio signal and second encoding information for second encoding of a second audio signal, and to generate Third encoding information for the first encoding of the second audio signal and fourth encoding information for the second encoding of the third audio signal; a first encoding unit configured to generate first data and second data; second encoding a unit configured to generate third data and fourth data by performing second encoding on the third audio signal; and a multiplexing unit configured to generate a stream of the first audio signal and a stream of the second audio signal. In case of a loss or error in the stream of the second audio signal, the third data is decoded instead of the second data.

Description

technical field [0001] The present invention relates to an encoding device, an encoding method, a decoding device, a decoding method, and a program, and more particularly, to an encoding device, an encoding method, a decoding device, a decoding method, and a program capable of reducing the bit rate of data used for interpolation . Background technique [0002] In general, examples of methods for encoding audio signals include transform encoding methods such as Moving Picture Experts Group Audio Layer-3 (MP3), Advanced Audio Coding (AAC), and Adaptive Transform Acoustic Coding (ATRAC). [0003] figure 1 is a block diagram showing an example of the configuration of an encoding device that encodes an audio signal. [0004] figure 1 The encoding device 10 includes a Modified Discrete Cosine Transform (MDCT) unit 11 , a normalization unit 12 , a quantization unit 13 , an encoding unit 14 and a multiplexing unit 15 . [0005] A pulse code modulation (PCM) signal T of audio of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/14G10L19/00G10L19/005G10L19/02
CPCG10L19/005G10L19/02
Inventor 铃木志朗松村祐树
Owner SONY CORP
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