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Apparatus for decoding video signals encoded in different formats
| Details |
Inventors: Stewart, John S.;
Assignee: Thomson Consumer Electronics, Inc. (Indianapolis, IN)
Primary Examiner: Kostak; Victor R.
Assistant Examiner:
Attorney, Agent or Firm: Tripoli; Joseph S., Kurdyla; Ronald H., Burke; Alexander J.
An adaptive receiver includes an adaptive decoder for providing decoded output data from a video signal encoded for satellite, terrestrial or cable transmission. The apparatus includes an adaptive decoder for providing a first decoded output as a function of a code rate selected from a plurality of code rates. The apparatus also includes an adaptive deinterleaver for deinterleaving the first decoded output in accordance with a deinterleaving function selected from a plurality of deinterleaving functions. In addition, the apparatus includes an output signal processor for processing the deinterleaved output data to provide the decoded output data. The demodulator may also incorporate a an adaptive error decoder for detecting and correcting errors in the deinterleaved output. In addition, a signal quality detector may provide an estimate of the error in the decoded output data. The apparatus is automatically configured to be compatible with the encoded video signal format in response to the error estimate. |
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DETAILED DESCRIPTION In accordance with the present invention it is recognized that a signal processing network can advantageously accommodate multiple decoding functions in the context of a digital television signal processing system, for example.
In accordance with the principles of the invention, a disclosed digital signal processing network provides adaptive decoding networks incorporating different types of decoding functions, illustratively related to code rate, deinterleaving, and error processing functions.
In a system for receiving and adaptively processing a video signal encoded in one of a plurality of different formats suitable for satellite, terrestrial or cable transmission, apparatus in accordance with the principles of the invention provides decoded output data.
In an illustrated embodiment, the apparatus includes an adaptive decoder for providing a first decoded output as a function of a code rate selected from a plurality of code rates.
The apparatus also includes an adaptive deinterleaver for deinterleaving the first decoded output in accordance with a deinterleaving function selected from a plurality of deinterleaving functions.
In addition, the apparatus includes an output signal processor for processing the deinterleaved output data to provide the decoded output data.
In accordance with a feature of the invention, an adaptive error decoder detects and corrects errors in an adaptive decoder output.
In accordance with another feature of the invention, a an adaptive deinterleaver deinterleaver the encoded video signal and an adaptive error decoder detects and corrects errors in the deinterleaved output.
In accordance with a further feature of the invention, a signal quality detector provides an estimate of the error in the decoded output data.
The apparatus is automatically configured to be compatible with the encoded video signal format in response to the error estimate.
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Television 
