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公开(公告)号:US20250105824A1
公开(公告)日:2025-03-27
申请号:US18650884
申请日:2024-04-30
Applicant: Sirius XM Radio Inc.
Inventor: Carl Scarpa , Robert Joseph Topper
Abstract: Systems and methods for performing automatic frequency control are provided. Instead of relying on individual frequency tuners for each channel of a multi-channel receiver system, the present subject matter uses a single frequency tuner for receiving each channel of the multi-channel receiver system. A locked demodulator may be designated as a reference demodulator and frequency offset values associated with the reference demodulator may be applied to other demodulators of the multi-channel receiver. These frequency offset values may be used by individual demodulators of each channel for correcting corresponding frequency offsets.
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公开(公告)号:US20250104739A1
公开(公告)日:2025-03-27
申请号:US18635477
申请日:2024-04-15
Applicant: Sirius XM Radio Inc.
Inventor: Raymond Lowe , Mark Kalman , Deepen Sinha , Christopher Ward
IPC: G11B27/038 , G06F3/0481 , G06F3/04847 , G06F3/16 , G06F9/445 , G06F9/50 , G06Q30/02 , G06Q30/0601 , G10H1/00 , G10H1/06 , G10L19/00 , G11B27/031 , G11B27/10 , G11B27/32 , H04H20/38 , H04H60/04 , H04L67/306
Abstract: Systems and methods are presented for efficient cross-fading of compressed domain information streams on a user/client device. Exemplary systems may provide cross-fade between AAC/Enhanced AAC Plus information streams, between MP3 information streams, or between information streams of unmatched formats. These systems are distinguished in that cross-fade is directly applied to compressed bitstreams so a single decode operation is performed on the resulting bitstream. Thus, a set of frames from each input stream associated with the time interval in which a cross fade is decoded, and combined and recoded with a cross fade or other effect now in the compressed bitstream. Once sent through the client device's decoder, the user hears the transitional effect. The only input data that is decoded and processed is that associated with the portion of each stream used the crossfade, blend or other interstitial, and thus the vast majority of input streams are left compressed.
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公开(公告)号:US20230121278A1
公开(公告)日:2023-04-20
申请号:US17851172
申请日:2022-06-28
Applicant: Sirius XM Radio Inc.
Inventor: Stuart A. COX , Gary John CONNERS , Todd VANZANDT
IPC: G06F3/0482 , G11B27/10 , H04N5/76 , H04N9/82 , H04L65/60 , H04N21/433 , H04N21/4627 , H04N21/466 , H04N21/472 , H04N21/482 , H04N21/61 , H04L65/611 , H04L65/612 , H04L65/75 , H04L67/568 , H04H40/90 , H04W88/06 , G06N5/02
Abstract: Systems and methods for interaction of satellite and Internet protocol features in content delivery systems are presented. Using such systems and methods, the delivery of some content to the same product by Satellite delivery, other content by IP delivery, and still other content by both Satellite and IP delivery can enhance the utility of both the content and the product for an end user and can further optimize the costs and quality of service associated with delivering the content. A method of providing content and data to a combined satellite and IP network receiver is presented, including broadcasting via satellite content and data to the receiver, and sending via an IP based communications network content and data to the receiver, where the content and data provided over the Satellite broadcast enables capabilities of the receiver needed to consume content received by IP delivery, and the content and data provided via IP delivery enables capabilities of the receiver needed to consume content received from the satellite broadcast.
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公开(公告)号:US11463234B2
公开(公告)日:2022-10-04
申请号:US17157083
申请日:2021-01-25
Applicant: Sirius XM Radio Inc.
Inventor: Carl Scarpa , Edward Schell
Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.
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公开(公告)号:US20220006609A1
公开(公告)日:2022-01-06
申请号:US17157083
申请日:2021-01-25
Applicant: Sirius XM Radio Inc.
Inventor: Carl Scarpa , Edward Schell
IPC: H04L7/033
Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.
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公开(公告)号:US20210281461A1
公开(公告)日:2021-09-09
申请号:US17075046
申请日:2020-10-20
Applicant: Sirius XM Radio Inc.
Inventor: Edward Schell , Carl Scarpa
Abstract: Systems and methods for a non-data-aided (NDA) approach to advanced OFDM timing are provided. This approach allows for accurate OFDM symbol timing and synchronization by avoiding inter-symbol interference (ISI) in multipath environments where an earliest arriving signal may not be the strongest signal. The NDA approach may rely on generating and applying a bias correction to a combined correlation result of the multi-path signals.
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公开(公告)号:US11108460B2
公开(公告)日:2021-08-31
申请号:US16168285
申请日:2018-10-23
Applicant: Sirius XM Radio, Inc.
Inventor: Edward Schell , Carl Scarpa , John Goslin
Abstract: Systems, algorithms and methods for reclaiming unused portions of a satellite broadcast service's bandwidth for new services, utilizing higher performance coding techniques to yield better throughput, are presented. These systems, algorithms and methods achieve the reclaimed bandwidth in a way that is invisible to a legacy receiver, and that does not interfere with its reception of a legacy signal. In one embodiment, new data may be transmitted within a legacy transmission frame, for example within its cluster structure, using the same modulation and synchronization as used for the legacy data. The new data may be inserted into a channel or other subdivision at a head end. In another embodiment, one or more clusters or subdivisions with only new data may be transmitted, using the same modulation and synchronization as the legacy data clusters, but now employing a higher performing FEC and data interleaving structure on those clusters which contain only new data to yield an increase in available throughput. Finally, in a third embodiment, one or more clusters containing only new data may be transmitted, and in said one or more all new data clusters, different modulation and synchronization may be used then that of the legacy data clusters, thus employing a higher performing FEC and data interleaving structure than that of the legacy clusters. Various combinations of these approaches are also presented, as well as a set of novel receivers, or receiver configurations, to implement them and their combinations.
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公开(公告)号:US11102619B2
公开(公告)日:2021-08-24
申请号:US16358429
申请日:2019-03-19
Applicant: Sirius XM Radio Inc.
Inventor: Richard Andrew Michalski , Mark Rindsberg , Ashok Vadekar , Paul Marko , Craig Wadin
IPC: H04W12/08 , H04W48/10 , H04L9/32 , H04W4/06 , H04W4/12 , H04W12/06 , H04W12/069 , H04W12/082
Abstract: Various multiple methods of data transport, and combinations thereof, may be used to initialize or update conditional access information on various devices. In an integrated device having both a broadcast receiver, such as an SDARS receiver, and a two-way communications transceiver, such as an LTE, 3G, 4G or 5G modem, or the like, conditional access information for the broadcast receiver may be sent to the transceiver, and then passed to the broadcast receiver, or vice versa. Additionally, for example, the broadcast receiver may be sent, over the broadcast communications channel, a “wake-up” message for the two-way transceiver, which message may then be passed to the two-way transceiver, so as to make it ready to receive conditional access information over the two-way communications channel, or vice versa. Moreover, because of the presence of a two-way communications path, various acknowledgements of conditional access status updates received and processed by the broadcast receiver may be sent—thus realizing a significant improvement over the current practice of sending multiple periodic messages over the broadcast channel, to insure (but never have confirmation of) receipt.
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公开(公告)号:US20210143799A1
公开(公告)日:2021-05-13
申请号:US16907885
申请日:2020-06-22
Applicant: Sirius XM Radio Inc.
Inventor: Carl Scarpa , Robert Joseph Topper
Abstract: Systems and methods for performing automatic frequency control are provided. Instead of relying on individual frequency tuners for each channel of a multi-channel receiver system, the present subject matter uses a single frequency tuner for receiving each channel of the multi-channel receiver system. A locked demodulator may be designated as a reference demodulator and frequency offset values associated with the reference demodulator may be applied to other demodulators of the multi-channel receiver. These frequency offset values may be used by individual demodulators of each channel for correcting corresponding frequency offsets.
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公开(公告)号:US20210119847A1
公开(公告)日:2021-04-22
申请号:US16655822
申请日:2019-10-17
Applicant: Sirius XM Radio Inc.
Inventor: Edward Schell , Carl Scarpa
Abstract: Systems and methods for enabling pre-compensation of timing offsets in OFDM receivers without invalidating channel estimates are described. Timing offset estimations may be sent along with the received OFDM symbols for FFT computation and generating a de-rotated signal output. The timing offset estimation may provide a reference point for dynamic tracking of timing for an OFDM signal and estimated based on an integral value associated with the OFDM signal.
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