发明名称 |
AN IN-BAND-ON-CHANNEL BROADCAST SYSTEM FOR DIGITAL DATA |
摘要 |
An FM broadcast transmitter (Fig. 5) transmits a broadcast signal having a carrier at a broadcast frequency and sidebands, able to be transmitted at full power, within a transmission bandwidth around the carrier. It includes a source of a modulated FM stereo signal having a carrier at the broadcast frequency and having sidebands with a bandwidth less than the trnasmission bandwidth representing a stereo signal. It also includes a source of a modulated IBOC signal, having carrier pulses spaced relative to each other to represent the IBOC digital data signal encoded as a variable pulse width encoded signal, and a bandwidth within the transmission bandwidth not overlapping the FM stereo signal sidebands. A signal combiner combines the modulated FM stereo signal and the modulated IBOC signal to form the broadcast signal. An FM broadcast receiver (Fig. 6) receives a broadcast signal including a first modulated signal representing an FM stereo signal, and a second modulated signal, having carrier pulses spaced relative to each other to represent an in-band-on-channel (IBOC) digital data signal encoded as a variable pulse width encoded signal. It includes a signal separator for generating a first separated signal representing the FM stereo signal and a second separated signal representing the IBOC digital data signal. An FM signal processor generates a stereo audio signal represented by the FM stereo signal. An IBOC signal processor generates a digital data signal represented by the IBOC digital data signal. |
申请公布号 |
WO0209329(A2) |
申请公布日期 |
2002.01.31 |
申请号 |
WO2001US22850 |
申请日期 |
2001.07.20 |
申请人 |
THOMSON LICENSING S.A.;MOHAN, CHANDRA;ZHANG, ZHIMING, JAMES;APRAEZ, MANUEL |
发明人 |
MOHAN, CHANDRA;ZHANG, ZHIMING, JAMES;APRAEZ, MANUEL |
分类号 |
H04B1/04;H04B1/16;H04H20/30 |
主分类号 |
H04B1/04 |
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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