发明名称 |
Digital speech/data discriminator for transcoding unit |
摘要 |
A digital transcoding unit receiving incoming PCM-coded speech and data samples to be distributed after selective quantization to different outgoing channels, with fewer quantizing bits assigned to speech samples than to data samples, includes a discriminator distinguishing among speech samples, high-rate data samples and low-rate data samples on the basis of bandwidth and number of zero crossings. Low-rate data samples are directed by the discriminator to outgoing speech channels, rather than data channels, for more efficient transmission-line utilization.
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申请公布号 |
US4457013(A) |
申请公布日期 |
1984.06.26 |
申请号 |
US19820351538 |
申请日期 |
1982.02.23 |
申请人 |
CSELT CENTRO STUDI E LABORATORI TELECOMUNICAZIONI S.P.A. |
发明人 |
CASTELLINO, PAOLO;RUSINA, FULVIO |
分类号 |
H04M11/06;H03H17/06;H04B14/04;H04J3/12;H04J3/17;H04J99/00;H04M11/00;(IPC1-7):G10L1/00 |
主分类号 |
H04M11/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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