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Apparatus and method for encoding and decoding signal

A technology of encoding signals and decoding methods, which is applied in speech analysis, instruments, etc., and can solve the problems of low efficiency and low efficiency in processing speech signals

Active Publication Date: 2009-02-18
LG ELECTRONICS INC +1
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Problems solved by technology

[0002] Conventional audio codecs can provide high-quality audio signals at high bit rates of 48kbps or greater, but are inefficient for processing speech signals
On the other hand, conventional speech coders can efficiently encode speech signals at low bit rates of 12kbps or less, but are inefficient for encoding various audio signals

Method used

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  • Apparatus and method for encoding and decoding signal
  • Apparatus and method for encoding and decoding signal
  • Apparatus and method for encoding and decoding signal

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Embodiment Construction

[0027] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0028] FIG. 1 is a block diagram of an encoding device according to an embodiment of the present invention. Referring to FIG. 1 , the encoding device includes a classification module 100 , an encoding module 200 and a bit packing module 300 .

[0029] The encoding module 200 includes a plurality of encoding units of a first encoding unit 210 to an m-th encoding unit 220 performing different encoding methods.

[0030] The classification module 100 divides the input signal into a plurality of divided signals, and matches each of the divided signals to one of the first to mth encoding units 210 to 220 . Some of the first to mth encoding units 210 to 220 may match two or more split signals or may not match the split signals at all.

[0031] The sorting module 100 may allocate a bit quantity to encode each ...

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Abstract

Encoding and decoding apparatuses and encoding and decoding methods are provided. The decoding method includes extracting a plurality of encoded signals from an input bitstream, determining which of a plurality of decoding methods is to be used to decode each of the encoded signals, decoding the encoded signals using the determined decoding methods, and synthesizing the decoded signals. Accordingly, it is possible to encode signals having different characteristics at an optimum bitrate by classifying the signals into one or more classes according to the characteristics of the signals and encoding each of the signals using an encoding unit that can best serve the class where a corresponding signal belongs. In addition, it is possible to efficiently encode various signals including audio and speech signals.

Description

technical field [0001] The present invention relates to an encoding and decoding device and an encoding and decoding method, and more particularly, to an encoding and decoding device and an encoding and decoding method that can encode or decode a signal at an optimal bit rate according to characteristics of the signal. Background technique [0002] Conventional audio encoders can provide high-quality audio signals at high bit rates of 48 kbps or more, but are inefficient for processing speech signals. On the other hand, conventional speech coders can efficiently encode speech signals at a low bit rate of 12 kbps or less, but are inefficient for encoding various audio signals. Contents of the invention [0003] technical problem [0004] The present invention provides an encoding and decoding device and an encoding and decoding method that can encode or decode signals having different characteristics (for example, speech and audio signals) at an optimum bit rate. [0005]...

Claims

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Application Information

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IPC IPC(8): G10L19/00G10L19/12G10L19/20G10L19/24
Inventor 郑亮源吴贤午金孝镇崔升钟李东锦姜泓求李在晟
Owner LG ELECTRONICS INC
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