发明名称 |
Stereo coding method and apparatus |
摘要 |
A stereo coding method includes transforming a stereo left channel signal and a stereo right channel signal in a time domain to a frequency domain to form a left channel signal and a right channel signal in the frequency domain; down-mixing the left channel signal and the right channel signal in the frequency domain to generate a monophonic down-mix signal, and transmitting bits obtained after quantization coding is performed on the down-mix signal; extracting spatial parameters of the left channel signal and the right channel signal in the frequency domain; estimating a group delay and a group phase between stereo left and right channels by using the left channel signal and the right channel signal in the frequency domain; and performing quantization coding on the group delay, the group phase and the spatial parameters, so as to obtain a high-quality stereo coding performance at a low bit rate. |
申请公布号 |
US9105265(B2) |
申请公布日期 |
2015.08.11 |
申请号 |
US201213567982 |
申请日期 |
2012.08.06 |
申请人 |
Huawei Technologies Co., Ltd. |
发明人 |
Wu Wenhai;Miao Lei;Lang Yue;Zhang Qi |
分类号 |
H04R5/00;G10L19/008 |
主分类号 |
H04R5/00 |
代理机构 |
Slater & Matsil, L.L.P. |
代理人 |
Slater & Matsil, L.L.P. |
主权项 |
1. A stereo coding method, comprising:
transforming a stereo left channel signal and a stereo right channel signal in a time domain to form a left channel signal and a right channel signal in a frequency domain; down-mixing the left channel signal and the right channel signal in the frequency domain to generate a monophonic down-mix signal; transmitting bits obtained after quantization coding is performed on the down-mix signal; extracting spatial parameters of the left channel signal and the right channel signal in the frequency domain; estimating a group delay and a group phase between stereo left and right channels by using the left channel signal and the right channel signal in the frequency domain; and performing quantization coding on the group delay, the group phase and the spatial parameters. |
地址 |
Shenzhen CN |