Sound coding device and method and sound decoding device and method

Abstract

A sound encoding device comprises the time changing prediction analysis module to get the stimulation signal, time frequency mapping module to get the stimulation signal, encoding module to get the low frequency wave encoding data, middle frequency encoding data and high frequency parameter encoding data, bit current complex module for the repetitive use of the parameter encoding data to output sound encoding data. It also relates to a sound encoding method, a sound decoding device and method. It can realize high quality encoding for the sound and music at low code rate.

Description

technical field [0001] The present invention relates to sound processing technology, more specifically, to a sound encoding device and method, and a sound decoding device and method suitable for adaptive multi-rate wideband speech and audio. Background technique [0002] After years of technological development, the coding technology of digital sound, including signals perceivable by human ears such as speech, music, natural sound and artificially synthesized sound, has become very mature. At present, many audio coding technologies have become industrial standards and are widely used and integrated into people's daily life. Such as AC-3 of Dolby Laboratories, DTS of Digital Cinema Systems, MP3 and AAC of the Moving Picture Experts Group (MPEG), WMA of Microsoft, ATRAC of Sony, G. Technologies such as 723 and G.729 are the result of the development of digital sound coding technology at different stages. [0003] Based on the complexity of sound generation, it is different f...

AI Technical Summary

Problems solved by technology

However, in order to be compatible with the ACELP standard and pursue lower complexity, AMR WB+ adopts an overly simple waveform + parameter combination mode, resulting in poor quality of music signal encoding

At the same time, in order to ensure a certain encoding quality, it is necessary to adopt a closed-loop encoding mode selection, and the encoding complexity is very high

[0007] It can be seen that in the application field of both voice and music, the existing EAAC+ technology and AMR WB+ technology have certain defects in terms of coding quality and complexity.

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