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Apparatus, method,and medium for processing audio signal using correlation between bands

A technology between audio signals and frequency bands, applied in the direction of pulse modulation TV signal transmission, speech analysis, instruments, etc., can solve the problem of sound quality degradation

Inactive Publication Date: 2006-06-07
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, since the audio frequency bandwidth is reduced, the sound quality is reduced more

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  • Apparatus, method,and medium for processing audio signal using correlation between bands
  • Apparatus, method,and medium for processing audio signal using correlation between bands
  • Apparatus, method,and medium for processing audio signal using correlation between bands

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Embodiment Construction

[0021] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The exemplary embodiments are described below in order to explain the present invention by referring to the figures.

[0022] figure 1 is a block diagram of an apparatus for processing an audio signal according to an exemplary embodiment of the present invention. figure 1 The device includes an encoding unit 10 and a decoding unit 12 .

[0023] The encoding unit 10 encodes the input audio signal input through the input terminal IN1 and sends the encoded result to the decoding unit 12 . The decoding unit 12 in this case decodes the input audio signal encoded by the encoding unit 10 and outputs the decoded result through the output terminal OUT1.

[0024] In an exemplary embodiment, a subband with a high frequency is called a first subband, and a subband wi...

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Abstract

An apparatus, method and medium for processing audio signals using correlation between frequency bands. The device includes: an encoding unit that encodes an input audio signal; and a decoding unit that decodes the encoded input audio signal; wherein the encoding unit includes a correlation analyzer that searches the first subband and each The most similar subbands having a correlation greater than a predetermined value between the most similar subbands among the first subbands generate information on the second searched subbands, and the decoding unit includes a high-frequency component restoration section that uses the the generated information on the second subband generated by the correlation analyzer and transmitted in bitstream format copies data on the second searched subband as data on the first subband to perform decoding on the first subband, Also, the first subband is a subband belonging to a high frequency band among frequency bands obtained by subband filtering the input audio signal, and the second subband is a subband belonging to a low frequency band among frequency bands obtained by subband filtering.

Description

technical field [0001] The present invention relates to audio signal processing using, for example, Motion Picture Experts Group (MPEG)-4, i.e. audio signal encoding and decoding, and more particularly relates to an apparatus and method for processing audio signals using correlation between frequency bands and medium. Background technique [0002] In conventional methods of processing audio signals such as Perceptual Noise Substitution (PNS), which is used as an MPEG-4 audio coding tool, audio signals can be efficiently processed at low bit rates such as 64kbps / stereo, but the sound quality is limited at high bit rates. rate decreased. In the conventional method, specifically, when dealing with transient audio signals, the sound quality degrades more. Also, in the conventional method, the audio signal is encoded by reducing the audio bandwidth because the number of available bits is small. In this case, since the audio frequency bandwidth is reduc...

Claims

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Application Information

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IPC IPC(8): H04N7/52G10L19/02G10L19/032
CPCG10L19/0204G10L21/038G10L19/02
Inventor 金重会金度亨李时和
Owner SAMSUNG ELECTRONICS CO LTD
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