Method and apparatus for coding audio signal

An audio signal and audio coding technology, which is applied in speech analysis, code conversion, instruments, etc., can solve the problems of high-performance processor power consumption and other shortcomings

Inactive Publication Date: 2006-10-04
LG ELECTRONICS INC +1
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Problems solved by technology

However, high-performance processors have disadvantages in terms of power consumption

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  • Method and apparatus for coding audio signal
  • Method and apparatus for coding audio signal
  • Method and apparatus for coding audio signal

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Embodiment Construction

[0048] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0049] A method and apparatus for encoding an audio signal according to the present invention will be described with reference to the accompanying drawings. The present invention aims to reduce the amount of computation required for FFT processing for performing psychoacoustic model processing of the MPEG-4 AAC algorithm.

[0050] figure 2 is a block diagram showing an audio encoding device according to an embodiment of the present invention. Such as figure 2 As shown, the audio coding device according to the present invention includes an MDCT block 110, a modified discrete sine transform (MDST) block 125, a finite impulse response (FIR) filter 127, a psychoacoustic model block 130, a coding e...

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Abstract

An audio coding method and apparatus capable of improving efficiency of a MPEG-4 AAC (Moving Picture Expert Group-4 Advanced Audio Coding) process are disclosed. The audio coding method and apparatus reduce the number of calculations of an audio coding algorithm to improve efficiency of an audio coding process. Specifically, the audio coding method and apparatus reduce the number of calculations required for a Psychoacoustic model process of the MPEG-4 AAC algorithm capable of coding an audio signal.

Description

[0001] This application claims priority from Korean Patent Application No: 10-2005-0027029 filed on Mar. 31, 2005, which is hereby incorporated by reference in its entirety. technical field [0002] The invention relates to methods and devices for encoding audio signals. In particular, the present invention relates to a method and apparatus for encoding audio signals to improve processing efficiency of the Moving Picture Experts Group 4 Advanced Audio Coding (MPEG-4 AAC) scheme. Background technique [0003] In systems capable of providing multimedia services such as Digital Audio Broadcasting (DAB) services, Internet telephony services, or Audio on Demand (AOD) services, the Moving Picture Experts Group (MPEG) audio standard plays a role in the storage and transmission of audio signals. important role. The MPEG audio coding algorithm based on the MPEG audio standard is used to compress audio signals without losing subjective sound quality, thereby reducing the channel capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30H03M7/40G10L19/02
CPCG10L19/02H04B1/665G01B13/02G01B3/18
Inventor 康泰益崔珍奎李瑾燮朴荣喆尹大熙
Owner LG ELECTRONICS INC
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