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公开(公告)号：US10255926B2
公开(公告)日：2019-04-09
申请号：US15926536
申请日：2018-03-20
摘要： 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.
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公开(公告)号：US09755598B2
公开(公告)日：2017-09-05
申请号：US14974809
申请日：2015-12-18
CPC分类号： H03G3/3005 , G10L19/167 , H03G3/002 , H04H20/22 , H04H20/26 , H04H20/47 , H04H40/36 , H04H2201/18
摘要： A method for processing a digital audio broadcast signal includes: separating an analog audio portion and a digital audio portion of the digital audio broadcast signal; determining the loudness of the analog audio portion and the digital audio portion over a first short time interval; using the loudness of the analog and digital audio portions to calculate a short term average gain; determining a long term average gain; converting one of the long term average gain or the short term average gain to dB; if an output has been blended to digital, adjusting a digital gain parameter by a preselected increment to produce a digital gain parameter; if an output has not been blended to digital, setting the digital gain parameter to the short term average gain; providing the digital gain parameter to an audio processor; and repeating the above steps using a second short time interval.
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公开(公告)号：US20230005365A1
公开(公告)日：2023-01-05
申请号：US17943364
申请日：2022-09-13
IPC分类号： G08G1/07
摘要： A method comprises: generating a traffic sign message configured to configure an active traffic sign that is electronically configurable; encrypting the traffic sign message to produce an encrypted traffic sign message; sending the encrypted traffic sign message to a radio broadcast transmitter; and at the radio broadcast transmitter, transmitting the encrypted traffic sign message in a radio broadcast signal; and at the active traffic sign: receiving the radio broadcast signal and recovering the encrypted traffic sign message from the radio broadcast signal; decrypting the encrypted traffic sign message to produce the traffic sign message; and configuring the active traffic sign according to the traffic sign message.
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公开(公告)号：US20170179899A1
公开(公告)日：2017-06-22
申请号：US14974809
申请日：2015-12-18
CPC分类号： H03G3/3005 , G10L19/167 , H03G3/002 , H04H20/22 , H04H20/26 , H04H20/47 , H04H40/36 , H04H2201/18
摘要： A method for processing a digital audio broadcast signal includes: separating an analog audio portion and a digital audio portion of the digital audio broadcast signal; determining the loudness of the analog audio portion and the digital audio portion over a first short time interval; using the loudness of the analog and digital audio portions to calculate a short term average gain; determining a long term average gain; converting one of the long term average gain or the short term average gain to dB; if an output has been blended to digital, adjusting a digital gain parameter by a preselected increment to produce a digital gain parameter; if an output has not been blended to digital, setting the digital gain parameter to the short term average gain; providing the digital gain parameter to an audio processor; and repeating the above steps using a second short time interval.
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公开(公告)号：US11790774B2
公开(公告)日：2023-10-17
申请号：US17943364
申请日：2022-09-13
IPC分类号： G08G1/07
CPC分类号： G08G1/07
摘要： A method comprises: generating a traffic sign message configured to configure an active traffic sign that is electronically configurable; encrypting the traffic sign message to produce an encrypted traffic sign message; sending the encrypted traffic sign message to a radio broadcast transmitter; and at the radio broadcast transmitter, transmitting the encrypted traffic sign message in a radio broadcast signal; and at the active traffic sign: receiving the radio broadcast signal and recovering the encrypted traffic sign message from the radio broadcast signal; decrypting the encrypted traffic sign message to produce the traffic sign message; and configuring the active traffic sign according to the traffic sign message.
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公开(公告)号：US10177729B1
公开(公告)日：2019-01-08
申请号：US15899135
申请日：2018-02-19
发明人： Ashwini Pahuja
摘要： Systems and methods to process a digital audio broadcast signal having a plurality of digital audio signals can be implemented in a variety of applications. The digital audio broadcast signal having a main program service and a set of supplemental program services can be received at a digital audio system and processed to provide an audio signal to a set of speakers. The processing can include calculation of audio levels of audio signals of the main program service and the supplemental program services. One of the services can be selected with the audio signal of the selected service adjusted based on the calculated level of the selected service and a reference signal, prior to sending the audio signal to the set of speakers. In various embodiments, the reference signal can be an analog audio signal in the digital audio broadcast signal. Additional apparatus, systems, and methods are disclosed.
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公开(公告)号：US09947332B2
公开(公告)日：2018-04-17
申请号：US14966716
申请日：2015-12-11
IPC分类号： H04B1/16 , G10L19/16 , G10L19/008 , G10L19/24
CPC分类号： G10L19/167 , G10L19/008 , G10L19/24 , H04B1/16 , H04H20/30 , H04H60/12 , H04H2201/183
摘要： 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.
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公开(公告)号：US09129592B2
公开(公告)日：2015-09-08
申请号：US13844096
申请日：2013-03-15
发明人： Ashwini Pahuja , Weifeng Mu
IPC分类号： H03G11/00 , G10L19/005 , G10L21/0208
CPC分类号： G10L19/005 , G10L21/0208 , H04H2201/18
摘要： A method and apparatus are provided for processing a received digital radio broadcast signal to efficiently remove signal interference artifacts from digital and/or analog signals by using signal quality information extracted from audio samples in one or more buffered audio frames to detect audio frames containing clipped noise artifacts and weaker noise artifacts and to selectively apply anti-interference processing to remove the signal interference artifacts.
摘要翻译： 提供了一种用于处理接收到的数字无线电广播信号的方法和装置，以通过使用从一个或多个缓冲音频帧中的音频样本提取的信号质量信息来有效地消除来自数字和/或模拟信号的信号干扰伪影，以检测包含剪切噪声的音频帧 伪影和较弱的噪声伪像，并选择性地应用抗干扰处理以去除信号干扰伪像。
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公开(公告)号：USRE49210E1
公开(公告)日：2022-09-13
申请号：US16556658
申请日：2019-08-30
摘要： A method for processing a digital audio broadcast signal includes: separating an analog audio portion and a digital audio portion of the digital audio broadcast signal; determining the loudness of the analog audio portion and the digital audio portion over a first short time interval; using the loudness of the analog and digital audio portions to calculate a short term average gain; determining a long term average gain; converting one of the long term average gain or the short term average gain to dB; if an output has been blended to digital, adjusting a digital gain parameter by a preselected increment to produce a digital gain parameter; if an output has not been blended to digital, setting the digital gain parameter to the short term average gain; providing the digital gain parameter to an audio processor; and repeating the above steps using a second short time interval.
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10.再颁专利公开(公告)号：USRE48655E1
公开(公告)日：2021-07-20
申请号：US16575185
申请日：2019-09-18
摘要： A method for processing a radio signal includes producing first and second streams of audio samples; decimating the first and second streams of audio samples to produce first and second streams of decimated streams of audio samples; estimating a first offset value between corresponding samples in the first and second streams of decimated streams of audio samples; shifting one of the first and second streams of audio samples by a first shift value; decimating the first and second streams of audio samples to produce third and fourth streams of decimated audio samples; estimating a second offset value; determining a final offset value based on an intersection of ranges of valid results of the first and second offset values; and shifting one of the first and second streams of audio samples by the final offset value to align the first and second streams of audio samples.
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