基本信息:
- 专利标题： IN-BAND ON-CHANNEL DIGITAL BROADCASTING METHOD AND SYSTEM
- 专利标题（中）：带内信道数字广播方法和系统
- 申请号：EP97928918.8 申请日：1997-06-12
- 公开(公告)号：EP1016230A1 公开(公告)日：2000-07-05
- 发明人： Kumar, Derek D.
- 申请人： Kumar, Derek D.
- 申请人地址： 1587 Birchmeadow Court San Jose,California 95131 US
- 专利权人： Kumar, Derek D.
- 当前专利权人： Kumar, Derek D.
- 当前专利权人地址： 1587 Birchmeadow Court San Jose,California 95131 US
- 代理机构： Paul, Dieter-Alfred, Dipl.-Ing.
- 优先权： US666985 19960619
- 国际公布： WO9749207 19971224
- 主分类号： H04H1/00
- IPC分类号： H04H1/00 ; H04L27/26 ; H04L1/02 ; H04B7/12
摘要：
A method and system are provided for the transmission and reception of an In-band On-channel (IBOC) FM-band digital audio broadcast (DAB) signal. The IBOC DAB signal (63) is generated in the transmitter (47, 49) to occupy the upper and lower sideband frequency regions (11, 13) in the RF emission mask for the conventional broadcast analog FM-band. Redundant source bit information is transmitted in upper and lower sidebands so that the loss of information in either one but not both sidebands due to large amount of interference or distortion does not deleteriously affect the IBOC DAB receiver performance. The system exhibits frequency-diversity and time-diversity. The receiver (231, 233) determines which codeword bit estimate of upper or lower sideband signal is less erroneous. The receiver system selects between decoded estimates for each pair of demodulated ECC codewords or combines both ECC codeword estimates prior to decoding in certain embodiments.
摘要（中）：
提供了用于发送和接收带内同频道（IBOC）FM频带数字音频广播（DAB）信号的方法和系统。 在发射机（47,49）中产生IBOC DAB信号（63），以占据常规广播模拟FM频带的RF发射掩模中的上边带和下边带频率区域（11,13）。 在上边带和下边带中发送冗余源位信息，以便由于大量干扰或失真而在任一边带而非两边带中丢失信息不会有害地影响IBOC DAB接收机的性能。 该系统具有频率分集和时间多样性。 接收器（231,233）确定上边带或下边带信号的哪个码字比特估计较不准确。 在某些实施例中，接收机系统在每对解调的ECC码字的解码估计之间进行选择或者在解码之前对两个ECC码字估计进行组合。