发明名称 |
LOW BIT-RATE AUDIO CODING |
摘要 |
The perceived quality of an audio signals obtained from very low bit-rate audio coding system is improved by using expanding quantizers and arithmetic coding in a transmitter and using complementary compression and arithmetic decoding in a receiver. An expanding quantizer is used to control the number of signal components that are quantized to zero and arithmetic coding is use d to efficiently code the quantized-to-zero coefficients. This allows a wider bandwidth and more accurately quantized baseband signal to be conveyed to th e receiver, which regenerates an output signal by synthesizing the missing components.
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申请公布号 |
CA2492647(A1) |
申请公布日期 |
2004.01.22 |
申请号 |
CA20032492647 |
申请日期 |
2003.07.08 |
申请人 |
DOLBY LABORATORIES LICENSING CORPORATION |
发明人 |
TRUMAN, MICHAEL MEAD;VINTON, MARK STUART |
分类号 |
G10L19/02;H03M7/30;(IPC1-7):G10L19/02 |
主分类号 |
G10L19/02 |
代理机构 |
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