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Stereo audio encoding method and device, audio stream decoding method and device

A coding method and stereo sound technology, applied in the field of coding and decoding audio data, can solve complex and expensive problems

Inactive Publication Date: 2004-09-01
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, storing or transmitting stereo audio, that is, a combined signal of multiple single audio signals provided by multiple channels, is complex and expensive compared to storing or transmitting single audio

Method used

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  • Stereo audio encoding method and device, audio stream decoding method and device
  • Stereo audio encoding method and device, audio stream decoding method and device
  • Stereo audio encoding method and device, audio stream decoding method and device

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Embodiment Construction

[0080] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0081] figure 1 is a block diagram of an encoding device according to a preferred embodiment of the present invention;

[0082] refer to figure 1 , the encoding device encodes audio data into fewer bits by eliminating redundant data between channels, and includes a transformation unit 11 , a psychoacoustic unit 12 , a quantization unit 13 , a bit packing unit 14 and a redundant information elimination unit 15 .

[0083] The transformation unit 11 transforms audio samples obtained from a plurality of channels. In more detail, the transformation unit 11 receives Pulse Code Modulation (PCM) audio data as a time-domain audio signal, and transforms the signal into a frequency-domain signal with reference to information on a psychoacoustic model provided by the psychoacoustic unit 12 . When the difference between the characteristics of the audio sig...

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PUM

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Abstract

A stereo audio coding method, an apparatus thereof, a decoding method and an apparatus thereof are provided to supply more stable sound quality at a low frequency bandwidth and encode stereo audio into less bits. A conversion unit(11) converts audio samples obtained from a plurality of channels, respectively. A psychological sound unit(12) supplies attack sensing information to the conversion unit(11), ties the converted audio signal as proper subband signals, calculates a masking threshold in each subband by using the masking phenomenon due to the interaction of each signal and then supplies the calculated value to a quantizing unit(13). The quantizing unit(13) quantizes correlation cancellation samples of each band on the basis of corresponding scale factor information and supplies the quantized samples. A bit packing unit(14) codes the quantized samples without loss and packages the coded samples by the unit of frame.

Description

technical field [0001] The present invention relates to encoding and decoding audio data, and in particular to a method of encoding audio data obtained from a plurality of channels, ie stereo audio data, and a device therefor, a method for decoding an audio stream, and a device therefor. Background technique [0002] Stereo audio, ie a combined signal of audio signals provided by multiple channels, provides stereo sound to the listener and is in high demand compared to single audio provided from a single channel. [0003] However, storing or transmitting stereo audio, that is, a combined signal of multiple single audio signals provided by multiple channels, is complex and expensive compared to storing or transmitting single audio. Contents of the invention [0004] The present invention provides methods and apparatus for encoding / decoding audio data with scalability, whereby fine-grained scalability (FGS) can be provided wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/008H03M7/30H04H20/88H04R5/04
CPCG10L19/0017G10L19/008H03M7/30
Inventor 金重会金尚煜吴殷美
Owner SAMSUNG ELECTRONICS CO LTD
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