Method and apparatus for simultaneous recording and displaying two different video programs
First Claim
1. A method of simultaneously recording and viewing a plurality of video signals comprising the steps of:
- (a) decoding, using a first clock reference signal, a first video signal from a first video source in a common shared video decoder pipe;
(b) decoding, using said first clock reference signal, a second video signal from a second video source in the common shared video decoder pipe when said first and second video signals are to be displayed as a main picture and a picture in picture (PIP) picture;
c) encoding, using a second clock reference signal, said second video signal when said first video signal is to be displayed and said second video signal is to be recorded.
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Accused Products
Abstract
A method and apparatus for simultaneously recording and displaying video signals from two different video sources. The apparatus comprises a main channel processing circuit, a second channel processing circuit, and common circuitry. The common circuit comprises a digital video decoder pipe that decodes both first and second encoded video signals. A PIP picture is produced using a common reference clock that is derived from the first video signal. In a record mode, a second channel clock reference is coupled to the second channel processing circuit to produce a recordable signal using a digital encoder. The recordable signal also forms a PIP picture that is coupled to the main channel processing circuit to produce a PIP picture that is used to monitor the recording process.
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Citations
12 Claims
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1. A method of simultaneously recording and viewing a plurality of video signals comprising the steps of:
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(a) decoding, using a first clock reference signal, a first video signal from a first video source in a common shared video decoder pipe; (b) decoding, using said first clock reference signal, a second video signal from a second video source in the common shared video decoder pipe when said first and second video signals are to be displayed as a main picture and a picture in picture (PIP) picture; c) encoding, using a second clock reference signal, said second video signal when said first video signal is to be displayed and said second video signal is to be recorded. - View Dependent Claims (2, 3, 4, 5)
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6. Apparatus for simultaneously recording and displaying a plurality of video signals comprising:
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a common shared video decoder pipe for decoding said plurality of video signals from different video sources using a first clock reference signal; a main channel processing circuit, coupled to said common shared video decoder pipe, for producing a main picture from a first of said plurality of video signals for display; a second channel processing circuit, coupled to said common shared video decoder pipe, for producing a decoded video signal from a second of said plurality of video signals for PIP display and for encoding said second of said plurality of video signals using a second clock reference signal for recording. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification