发明名称 |
Audio encoder, audio encoding method, and associated computer program |
摘要 |
An SBR encoder includes a filter bank that receives an input signal, a time/frequency grid generator that controls a number of bits of various parameters, a parameter calculator that calculates various parameters, a parameter coding unit that encodes the parameters, a multiplexer that multiplexes encoded data, an upper-limit number-of-bit storage unit that stores an upper limit of the number of bit of encoded data of high-frequency component finally generated in a high-pass encoding process, and a number-of-bit controller. The number-of-bit controller controls the high-pass encoding process by preferentially encoding a parameter having a large influence to sound quality and not encoding a parameter having a small influence to the sound quality relative to a plurality of parameters, so that the number of bits of the encoded data of high-frequency component finally generated in the high-pass encoding process becomes equal to or less than the upper limit to be stored in the upper-limit number-of-bit storage unit.
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申请公布号 |
EP1916652(A1) |
申请公布日期 |
2008.04.30 |
申请号 |
EP20070118337 |
申请日期 |
2007.10.11 |
申请人 |
FUJITSU LTD. |
发明人 |
TSUCHINAGA, YOSHITERU;SUZUKI, MASANAO;SHIRAKAWA, MIYUKI;MAKIUCHI, TAKASHI |
分类号 |
G10L21/02;G10L19/00;G10L19/14 |
主分类号 |
G10L21/02 |
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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