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1. 发明申请

WO1989009965A1 ERROR DETECTION METHOD FOR SUB-BAND CODING 审中-公开
标题翻译：用于子带编码的错误检测方法
公开(公告)号：WO1989009965A1
公开(公告)日：1989-10-19
申请号：PCT/US1989001142
申请日：1989-03-16
申请人： MOTOROLA, INC.
发明人： MOTOROLA, INC. , MCLAUGHLIN, Michael, Joseph , RASKY, Phillip, David
IPC分类号： G06F11/10
CPC分类号： H04L1/201 , G10L19/005 , G11B20/1833 , H03M13/09 , H03M13/35 , H03M13/43 , H04B1/667 , H04L1/004 , H04L1/0061 , H04L1/0065 , H04L1/007 , H04L1/0071 , H04L1/0072 , H04L2001/0098
摘要： A method and apparatus is disclosed (Fig. 3) for improving the quality of speech samples communicated via sub-band coding utilizing adaptive bit allocation (Fig. 1), by providing error detection only on the adaptive bit allocation information. A first error detection code (340), such as a cyclic redundancy check (CRC), is calculated on the bit allocation parameters (330) in the transmitter (130) and sent to the receiver (180), where a second error detection code (370) is calculated based upon the reconstructed bit allocation parameters (360). The transmitted error detection code is then used to determine (380) if the received bit allocation information is correct, and if not, the frame of speech data is discarded. By protecting only the bit allocation information, additional speech frames may be salvaged from the error-prone channel, thus further increasing speech intelligibility.
摘要翻译：公开了一种用于通过仅利用自适应位分配信息提供错误检测来改善通过使用自适应位分配（图1）的子带编码传送的语音样本的质量的方法和装置（图3）。对发送机（130）中的比特分配参数（330）计算出诸如循环冗余校验（CRC）的第一错误检测码（340），并将其发送到接收机（180），其中第二错误检测码（370）基于重构的比特分配参数（360）来计算。然后，发送的错误检测码用于确定（380）所接收的比特分配信息是否正确，如果不是，则丢弃该语音数据帧。通过仅保护比特分配信息，可以从容易出错的信道中抢救附加语音帧，从而进一步增加语音可懂度。

2. 发明申请

WO1988010035A1 PROTECTION OF ENERGY INFORMATION IN SUB-BAND CODING 审中-公开
标题翻译：保护子带编码中的能源信息
公开(公告)号：WO1988010035A1
公开(公告)日：1988-12-15
申请号：PCT/US1988001790
申请日：1988-05-31
申请人： MOTOROLA, INC.
发明人： MOTOROLA, INC. , MCLAUGHLIN, Michael, Joseph , RASKY, Phillip, D.
IPC分类号： H04B14/06
CPC分类号： H04L1/007 , G10L19/005 , H03M13/35 , H04B1/667
摘要： An encoding system for transmission and reception of speech signals and utilizing sampling, filtering (12) and sub-band coding (14) techniques for reduction of the bit rate. The energy levels of each sub-band are determined with respect to the band having the maximum energy level. The energy level information is encoded and divided into protected and unprotected bits. Only the protected bits are used for the determination of the bit allocation of the sample information, but both protected and unprotected bits are utilized in reconstituting the original levels of the bands.
摘要翻译：一种用于发送和接收语音信号的编码系统，并利用采样，滤波（12）和子带编码（14）技术来降低比特率。相对于具有最大能级的频带确定每个子带的能级。能级信息被编码并分为受保护和不受保护的位。只有受保护的比特被用于确定样本信息的比特分配，但是利用保护的和不受保护的比特来重构波段的原始级别。

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