发明名称 |
DIGITAL TRANSMISSION SYSTEM FOR TRANSMITTING SPEECH SIGNALS AT A LOW BIT RATE, AND TRANSMITTER FOR USE IN SUCH A SYSTEM |
摘要 |
<p>In a digital transmission for low bit rate transfer of speech signals, the frequency information content of the speech signal is transferred via a first transmitter channel and the amplitude information content is transferred via a second transmitter channel. A particularly low bit rate of 4.8 to 7 kbits/second is made possible in that the transmission device in the first transmitter channel is in the form of a uniform delta modulator which is provided with an input circuit which so changes the shape of the speech signal that the input signal to the delta modulator has a constant slope.</p> |
申请公布号 |
CA1032478(A) |
申请公布日期 |
1978.06.06 |
申请号 |
CA19750233172 |
申请日期 |
1975.08.07 |
申请人 |
N.V. PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
BIJKER, ARNOLD J.;RIEMENS, KAREL |
分类号 |
H04B14/00;H04B1/66;(IPC1-7):10L1/08 |
主分类号 |
H04B14/00 |
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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