公开(公告)号：US06246698B1

公开(公告)日：2001-06-12

申请号：US09197911

申请日：1998-11-24

Applicant: Derek D. Kumar

Inventor： Derek D. Kumar

IPC: H04J105

CPC classification number: H04H20/22 ,  H04H20/33 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/0066 ,  H04L1/0069 ,  H04L1/007 ,  H04L5/0005

Abstract: 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 is generated in the transmitter to substantially occupy the upper and lower sideband frequency regions in the RF emission mask for the conventional broadcast analog FM-band. Redundant source bit information is transmitted in both the upper and lower sidebands so that the loss of information in either one but not both sidebands due to large amounts of interference or distortion, caused by, for example, first-adjacent interference, does not deleteriously affect the IBOC DAB receiver performance. The system exhibits both frequency-diversity and time-diversity. The receiver determines which codeword bit estimate, corresponding to either upper or lower sideband signals, is less likely to be 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.

Abstract translation: 提供了一种方法和系统。 带内在线（IBOC）FM波段数字音频广播（DAB）信号的发送和接收。 在发射机中产生IBOC DAB信号，以便在传统广播模拟FM频带的RF发射掩模中基本上占据上边带和下边带频率区域。 冗余源位信息在上边带和下边带两者中传输，使得由于例如由第一相邻干扰引起的大量干扰或失真导致的两个边带中的信息丢失不会有害地影响 IBOC DAB接收机性能。 该系统表现出频率分集和时间分集两者。 接收机确定对应于上边带或下边带信号的码字比特估计不太可能是错误的。 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，或者在某些实施例中在解码之前组合ECC码字估计。

公开(公告)号：US5949796A

公开(公告)日：1999-09-07

申请号：US666985

申请日：1996-06-19

Applicant: Derek D. Kumar

Inventor： Derek D. Kumar

IPC: H04H20/33 ,  H04L1/00 ,  H04J1/05 ,  H04J1/12

CPC classification number: H04H20/22 ,  H04H20/33 ,  H04L1/0066 ,  H04L1/007 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/0069 ,  H04L5/0005

Abstract: 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 is generated in the transmitter to substantially occupy the upper and lower sideband frequency regions in the RF emission mask for the conventional broadcast analog FM-band. Redundant source bit information is transmitted in both the upper and lower sidebands so that the loss of information in either one but not both sidebands due to large amounts of interference or distortion, caused by, for example, first-adjacent interference, does not deleteriously affect the IBOC DAB receiver performance. The system exhibits both frequency-diversity and time-diversity. The receiver determines which codeword bit estimate, corresponding to either upper or lower sideband signals, is less likely to be 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.

公开(公告)号：US5757854A

公开(公告)日：1998-05-26

申请号：US453318

申请日：1995-05-30

Applicant: Billie J. Hunsinger ,  A J. Vigil ,  Leland P. Solie

Inventor： Billie J. Hunsinger ,  A J. Vigil ,  Leland P. Solie

IPC: H04H20/30 ,  H04H60/11 ,  H04L5/02 ,  H04K1/10 ,  H04L27/28

CPC classification number: H04L5/023 ,  H04H20/30 ,  H04H2201/183 ,  H04H2201/20 ,  H04H60/11

Abstract: A system for combining AM and FM transmissions. In-band, On-channel, FM Digital Audio Broadcast (IBOC FM-DAB) allows simultaneous transmission of DAB and FM over existing FM allocations without interfering with conventional analog FM signals. The utility of existing FM spectrum allocations is therefore enhanced.

公开(公告)号：US11700161B2

公开(公告)日：2023-07-11

申请号：US16582892

申请日：2019-09-25

Applicant: Nautel Limited

Inventor： Philipp Schmid ,  Brian Walker

IPC: H04L27/26 ,  H01L33/00 ,  H01L33/48 ,  H01L33/60 ,  H01L33/62 ,  H01L33/64 ,  H04H20/00

CPC classification number: H04L27/2621 ,  H01L33/005 ,  H01L33/486 ,  H01L33/60 ,  H01L33/62 ,  H01L33/642 ,  H04H20/00 ,  H04L27/2623 ,  H04H2201/12 ,  H04H2201/183 ,  H04L27/2624

Abstract: A system for peak-to-average-power ratio (PAPR) reduction of a frequency shifted plurality of digital broadcast signals taking into account the combined signal peaks in order to transmit the signals more efficiently in a single broadcast transmission system. The PAPR algorithm takes into account a rotating constellation phase offset for the shifted signals corresponding to the amount of applied frequency shift. In the case of a dual sideband In-Band-On-Channel (IBOC) signal typically used in conjunction with an FM carrier in the center, the sidebands can be interleaved to create a new IBOC signal definition and take the place of the FM carrier for an all-digital transmission that is backward compatible with IBOC receivers allowing for a gradual migration to all digital broadcasting.

公开(公告)号：US20180123853A1

公开(公告)日：2018-05-03

申请号：US15565329

申请日：2016-04-08

Applicant: Nautel Limited

Inventor： Philipp Schmid ,  Brian Walker

IPC: H04L27/26 ,  H04H20/00

CPC classification number: H04L27/2621 ,  H04H20/00 ,  H04H2201/12 ,  H04H2201/183 ,  H04L27/2623 ,  H04L27/2624

Abstract: A system for peak-to-average-power ratio (PAPR) reduction of a frequency shifted plurality of digital broadcast signals taking into account the combined signal peaks in order to transmit the signals more efficiently in a single broadcast transmission system. The PAPR algorithm takes into account a rotating constellation phase offset for the shifted signals corresponding to the amount of applied frequency shift. In the case of a dual sideband In-Band-On-Channel (IBOC) signal typically used in conjunction with an FM carrier in the center, the sidebands can be interleaved to create a new IBOC signal definition and take the place of the FM carrier for an all-digital transmission that is backward compatible with IBOC receivers allowing for a gradual migration to all digital broadcasting.

公开(公告)号：US09947332B2

公开(公告)日：2018-04-17

申请号：US14966716

申请日：2015-12-11

Applicant: iBiquity Digital Corporation

Inventor： Gabriel Olochwoszcz ,  Ashwini Pahuja

IPC: H04B1/16 ,  G10L19/16 ,  G10L19/008 ,  G10L19/24

CPC classification number: G10L19/167 ,  G10L19/008 ,  G10L19/24 ,  H04B1/16 ,  H04H20/30 ,  H04H60/12 ,  H04H2201/183

Abstract: A method of processing a digital radio broadcast signal includes: (a) determining a plurality of current correlation sample values representative of a time delay between samples in an analog audio sample stream and samples in a digital audio sample stream; (b) determining a current inversion status; (c) updating a delay history and an inversion status history; (d) checking the current correlation sample values for consistency with a first confidence threshold; (e) if consistency is found in step (d), determining if each of a first plurality of values in the delay history is consistent within a predetermined range of the current correlation sample values; (f) if consistency is found in step (e), determining if a value in the inversion status history is consistent with the current inversion status; and (g) if the consistency is found in step (f), allowing blending of an output to the digital audio sample stream.

公开(公告)号：US08180470B2

公开(公告)日：2012-05-15

申请号：US12219989

申请日：2008-07-31

Applicant: Ashwini Pahuja

Inventor： Ashwini Pahuja

IPC: G06F17/00 ,  H04B1/00 ,  H04N7/12

CPC classification number: H04L5/06 ,  H04H20/30 ,  H04H60/12 ,  H04H2201/183 ,  H04H2201/186 ,  H04L27/02 ,  H04L27/10 ,  H04L27/2601

Abstract: Methods and systems lor temporally aligning audio samples of digital and analog portions ol a radio broadcast signal involve receiving a radio broadcast signal having analog and digital portions; separating the analog and digital portions; retrieving a stored first time interval of an approximate time for a sample of the digital portion to travel through a digital signal path in a receiver including a digital demodulator: measuring a second time lor the sample of the digital portion to travel from an input of the digital signal path to an input of the digital demodulator; generating a delay amount by adding the first time to the second time; delaying second audio samples of the digital portion by tho delay amount relative to first audio samples of tho analog portion such that the second audio samples are temporally aligned with the first audio samples; and combining ihe first and second audio samples.

Abstract translation: 无线电广播信号中的时间上对准数字和模拟部分的音频样本的方法和系统涉及接收具有模拟和数字部分的无线电广播信号; 分离模拟和数字部分; 检索存储的数字部分样本的近似时间的存储的第一时间间隔，以在包括数字解调器的接收机中经过数字信号路径;测量第二时间或数字部分的样本从 数字信号路径到数字解调器的输入端; 通过第二次添加第一次生成延迟量; 通过延迟相对于模拟部分的第一音频样本的延迟量来延迟数字部分的第二音频样本，使得第二音频样本在时间上与第一音频样本对准; 并结合我的第一和第二个音频样本。

公开(公告)号：US08086198B2

公开(公告)日：2011-12-27

申请号：US12310596

申请日：2007-08-30

Applicant: Kazuo Koyama ,  Masanori Ishida ,  Kazuyoshi Inako ,  Naoki Nakajima

Inventor： Kazuo Koyama ,  Masanori Ishida ,  Kazuyoshi Inako ,  Naoki Nakajima

IPC: H04B1/18

CPC classification number: H03J1/0091 ,  H04H20/30 ,  H04H20/89 ,  H04H40/18 ,  H04H60/41 ,  H04H2201/183

Abstract: A broadcasting receiver suitable for receiving a broadcasting signal transmitted in an IBOC signal format, comprises: a channel seek directing means for directing to start a channel seeking operation that selects selectable channel in an order of frequency; a channel seek controlling means for starting and controlling the channel seeking operation in accordance with the direction of the channel seek directing means; and a multichannel determining means for determining whether a selected frequency channel is providing multichannel digital broadcasting or not; and wherein the channel seek controlling means selects a next subchannel in an order of identification code before searching for the next frequency channel, if it is determined by the multichannel determining means that the selected frequency channel is providing the multichannel digital broadcasting.

Abstract translation: 适用于接收以IBOC信号格式发送的广播信号的广播接收机包括：信道寻道引导装置，用于引导以频率顺序选择可选频道的频道搜索操作; 频道搜索控制装置，用于根据频道搜索引导装置的方向启动和控制频道搜索​​操作; 以及多通道确定装置，用于确定所选择的频道是否正在提供多声道数字广播; 并且其中，如果由所述多通道确定装置确定所选择的频道正在提供所述多声道数字广播，则所述频道搜索控制装置以搜索下一个频道之前的识别码的顺序选择下一个子信道。

公开(公告)号：US08041292B2

公开(公告)日：2011-10-18

申请号：US11634045

申请日：2006-12-04

Applicant: Marek Milbar

Inventor： Marek Milbar

IPC: H04H1/00

CPC classification number: H04H20/30 ,  H04H20/08 ,  H04H60/80 ,  H04H60/92 ,  H04H60/95 ,  H04H2201/183

Abstract: An apparatus includes a network receiver for receiving an over-the-air in-band on-channel broadcast signal and extracting broadcast content from the broadcast signal, and an output for delivering the content by way of a first receiver output signal to a plurality of network player devices. A method performed by the apparatus is also included.

Abstract translation: 一种装置包括：网络接收器，用于接收空中带内在线广播信号并从广播信号中提取广播内容;以及输出端，用于通过第一接收机输出信号将内容传送到多个 网络播放器设备。 还包括由该装置执行的方法。

公开(公告)号：US07957478B2

公开(公告)日：2011-06-07

申请号：US11863943

申请日：2007-09-28

Applicant: Harvey Chalmers ,  Robert Michaels

Inventor： Harvey Chalmers ,  Robert Michaels

IPC: H04K1/10

CPC classification number: H04B17/0085 ,  H04H20/12 ,  H04H20/30 ,  H04H60/07 ,  H04H2201/183 ,  H04H2201/186 ,  H04L5/0007

Abstract: A signal generator includes a memory for storing content information in the form of vectors including in-phase and quadrature elements of an orthogonal frequency division multiplexing waveform, a processor for converting the vectors to a radio frequency signal, and a logic device for controlling the operation of the memory and the processor. The in-phase and quadrature elements represent baseband content of the orthogonal frequency-division multiplexing waveform.

Abstract translation: 信号发生器包括存储器，用于以包括正交频分多路复用波形的同相和正交元素的向量的形式存储内容信息，用于将向量转换为射频信号的处理器和用于控制操作的逻辑器件 的内存和处理器。 同相和正交元件表示正交频分复用波形的基带内容。