公开(公告)号：US3715512A

公开(公告)日：1973-02-06

申请号：US3715512D

申请日：1971-12-20

申请人： BELL TELEPHONE LABOR INC

发明人： KELLY J

IPC分类号： G10L19/04 ,  G10L1/06

CPC分类号： G10L19/04

摘要： In an adaptive, predictive coder for speech signals, the transmitted signal generally consists of an rms value, a pitch signal, a voice-unvoiced indication, and a number of parameter signals for adjusting the coefficients of a linear predictor. Transmission of these signals is improved in this invention by generating a low rate pulsive signal and by shaping its spectrum in accordance with the parameter signals. The pulsive signals thus act as a carrier for the parameters. The bandwidth required for transmitting the resulting composite signal, i.e., the modulated pulsive signal and the subsidiary signals, is substantially less than that of the original speech signal and somewhat less than that required for the transmission of predictively coded signals.

摘要翻译： 在用于语音信号的自适应预测编码器中，所发送的信号通常由有效值，音调信号，语音清音指示和用于调整线性预测器的系数的参数信号的数量组成。 通过产生低速度脉动信号和根据参数信号整形其频谱，本发明改进了这些信号的传输。 因此，脉动信号用作参数的载体。 传输所得到的复合信号所需的带宽，即调制的脉冲信号和辅助信号，显着小于原始语音信号的带宽，稍微小于传输预测编码信号所需的带宽。

公开(公告)号：US3806644A

公开(公告)日：1974-04-23

申请号：US33525773

申请日：1973-02-23

申请人： BELL TELEPHONE LABOR INC

发明人： BROWNE P ,  SAUTTER H ,  BURNS H ,  KELLY J

IPC分类号： H04N7/01 ,  H04N7/12 ,  H04N5/46 ,  H04N7/18

CPC分类号： H04N7/0105 ,  H04N7/122

摘要： Signals having the format standards of the PICTUREPHONE video telephone (PVT) system are converted to a signal having the format standards of commercial television (CTV). Achieving the foregoing is a scan converter which includes two shift registers in which successive lines are alternately stored at the line rate of the PVT system. As one register is filled, samples from the preceding PVT line are read out at a substantially faster rate. The registers are then switched as to function. A signal format is generated to cause the CTV receiver to operate in a noninterlace mode to produce a resulting CTV line raster that is in effect exactly equal to the number of lines in a PVT frame.

摘要翻译： 具有PICTUREPHONE视频电话（PVT）系统的格式标准的信号被转换成具有商业电视格式标准（CTV）的信号。 实现上述是一种扫描转换器，其包括两个移位寄存器，其中连续行以PVT系统的线路速率交替存储。 当一个寄存器被填充时，来自前一个PVT线的样本以比较快的速率读出。 然后将寄存器切换为功能。 产生信号格式以使CTV接收机以非隔行模式操作以产生实际上等于PVT帧中的行数的结果CTV线光栅。