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
CN1525438AInactive Publication Date: 2004-09-01SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Publication Date
2004-09-01
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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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