Multiple time-base clock for processing multiple satellite signals
First Claim
1. In a decoding apparatus for simultaneously servicing a plurality of independent programs for display on independent display devices, a multiple time-base clock generator comprising:
- a transport processor for demultiplexing multiple input transport streams to generate a first video stream corresponding to a first program signal, and to further generate a second video stream corresponding to a second program signal, said transport processor comprising a PCR circuit for extracting first PCR data from the transport streams corresponding to the first program signal, and for extracting second PCR data from the transport streams corresponding to the second program signal, anda clock circuit responsive to the first and second PCR data for generating a first clock signal that is synchronized to a program clock for the first program signal and for generating a second clock signal that is synchronized to a program clock for the second program signal.
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Accused Products
Abstract
An integrated receiver with multiple, independently synchronized clock signals for multiple channel transport stream decoding and delivery substantially implemented on a single CMOS integrated circuit is described. An integrated circuit that services two satellite programs must generate and distribute corresponding time domain clocks to the various components of the integrated circuit. The transport block that receives one or more satellite signals from a demodulating block will extract program clock recover values from each signal being decoded and use these values to produce an error signal or control word that serves as an input to a clock generator. Based upon this input, the clock circuit will produce a corresponding time domain clock for each channel serviced by the integrated circuit. The output of the clock circuit is distributed to the various processing blocks within the integrated circuit that operate upon channel content received and processed by the transport block.
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Citations
10 Claims
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1. In a decoding apparatus for simultaneously servicing a plurality of independent programs for display on independent display devices, a multiple time-base clock generator comprising:
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a transport processor for demultiplexing multiple input transport streams to generate a first video stream corresponding to a first program signal, and to further generate a second video stream corresponding to a second program signal, said transport processor comprising a PCR circuit for extracting first PCR data from the transport streams corresponding to the first program signal, and for extracting second PCR data from the transport streams corresponding to the second program signal, and a clock circuit responsive to the first and second PCR data for generating a first clock signal that is synchronized to a program clock for the first program signal and for generating a second clock signal that is synchronized to a program clock for the second program signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification