发明名称 |
METHOD OF ENCODING AND DECODING, CODER AND DECODER, PROGRAMME AND RECORDING CARRIER |
摘要 |
FIELD: physics.SUBSTANCE: sequence of frequency area counts isolated from acoustic signal is divided by weighed envelope and, then, to the gain. Obtained result is quantised while every count is subjected to variable-length encoding. The error between quantising and count after quantising is quantised with the help of data stored in said variable-length encoding. This quantising is executed by the rule that sets the counts in compliance with the number of memorised bits the errors of which should be quantised. At decoding, variable-length codes in sequence of codes being loaded are decoded to get the frequency area counts series. The error signal is additionally decoded by the rule depending on the variable-length code bits. Obtained series of counts is used to derive the initial series of counts in compliance with the auxiliary data.EFFECT: higher efficiency of acoustic signal encoding at encoding at low bit rate.38 cl, 6 dwg |
申请公布号 |
RU2571561(C2) |
申请公布日期 |
2015.12.20 |
申请号 |
RU20130143624 |
申请日期 |
2012.03.26 |
申请人 |
NIPPON TELEGRAF EHND TELEFON KORPOREJSHN |
发明人 |
MORIJA TAKEKHIRO;KHARADA NOBORU;KAMAMOTO JUTAKA;KHIVASAKI JUSUKE;FUKUI MASAKHIRO |
分类号 |
G10L19/02;H03M7/30 |
主分类号 |
G10L19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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