发明名称 |
AUDIO SIGNAL DECODING DEVICE AND AUDIO SIGNAL ENCODING DEVICE |
摘要 |
<p>In the conventional art inventions for coding multi-channel audio signals, three of the major processes involved are: generation of a reverberation signal using an all-pass filter; segmentation of a signal in the time and frequency domains for the purpose of level adjustment; and mixing of a coded binaural signal with an original signal coded up to a fixed crossover frequency. These processes pose the problems mentioned in the present invention. The present invention proposes the following three embodiments: to control the extent of reverberations by dynamically adjusting all-pass filter coefficients with the inter-channel coherence cues; to segment a signal in the time domain finely in the lower frequency region and coarsely in the higher frequency region; and to control a crossover frequency used for mixing based on a bit rate, and if the original signal is coarsely quantized, to mix a downmix signal with an original signal in proportions determined by an inter-channel coherence cue.</p> |
申请公布号 |
EP1768107(A4) |
申请公布日期 |
2009.10.21 |
申请号 |
EP20050765247 |
申请日期 |
2005.06.28 |
申请人 |
PANASONIC CORPORATION |
发明人 |
CHONG, KOK SENG;TANAKA, NAOYA;NEO, SUA HONG;TSUSHIMA, MINEO |
分类号 |
G10L19/00 |
主分类号 |
G10L19/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|