公开(公告)号：US07260225B2

公开(公告)日：2007-08-21

申请号：US10149248

申请日：2000-12-07

申请人： Bodo Teichmann ,  Oliver Kunz ,  Juergen Herre ,  Klaus Peichl ,  Michael Beer

发明人： Bodo Teichmann ,  Oliver Kunz ,  Juergen Herre ,  Klaus Peichl ,  Michael Beer

IPC分类号： H04H5/00

CPC分类号： H04S1/00 ,  G10L19/008

摘要： In a device for processing a stereo audio signal having a first channel and a second channel the stereo signal is at first analyzed to obtain a measure for a quantity of bits required by a coder to code the stereo audio signal using a coding algorithm. The first channel and the second channel are then modified when the measure for the quantity of bits is larger than a predetermined value, the modification being performed in such a way that the energy of a sum signal of the first and the second modified channel is in a predetermined relation to the energy of a sum signal of the first and the second channel and that a difference signal of the first and the second modified channel is attenuated in contrast to the difference signal of the first and the second channel. Especially for audio coders requiring a constant output bit rate the side channel is attenuated in the case of stereo audio signals, the coding of which cannot meet the output bit rate of the coder, by which a stereo channel separation is abandoned for the benefit of an increased audio bandwidth or a reduction of quantizing disturbances, respectively.

摘要翻译： 在用于处理具有第一通道和第二通道的立体声音频信号的设备中，首先分析立体声信号以获得编码器使用编码算法编码立体声音频信号所需的位数量度。 然后当比特量的测量大于预定值时修改第一信道和第二信道，修改是以第一和第二修改信道的和信号的能量处于 与第一和第二信道的和信号的能量的预定关系，并且与第一和第二信道的差分信号相比，第一和第二修改信道的差分信号被衰减。 特别是对于需要恒定输出比特率的音频编码器，在立体声音频信号的情况下，侧信道被衰减，其编码不能满足编码器的输出比特率，通过该编码器，放弃了立体声信道分离以有利于 分别增加音频带宽或减少量化干扰。