发明名称 |
DATA TRANSMISSION OVER A CODED VOICE CHANNEL |
摘要 |
A digital input symbol is transmitted to a receiver by determining one or more formant frequencies that correspond to the digital input symbol. In one embodiment, a pre-programmed addressable memory is used to map the set of possible digital input symbols onto a set of corresponding speech units, each comprising a superposition of one or more formant frequencies. A signal is then generated having the speech units. The signal is supplied for transmission over a voice channel. This may include supplying the signal to a voice coder prior to transmission. In another aspect of the invention, a forward error correction code (FEC) is determined for the digital input symbol, and the one or more speech units are modified as a function of the forward error correction code. In this way, the FEC may also be transmitted with the encoded input symbol. The modification may affect any of a number of attributes of the speech units, including a volume attribute and a pitch attribute. |
申请公布号 |
EP1040673(A1) |
申请公布日期 |
2000.10.04 |
申请号 |
EP19980963691 |
申请日期 |
1998.12.08 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
JONSSON, BJOERN;SWERUP, JAN;TOERNQVIST, KRISTER;NERBRANT, PER-OLOF |
分类号 |
G10L19/00;H04Q1/45;(IPC1-7):H04Q1/45 |
主分类号 |
G10L19/00 |
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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