Back to results
US 5,856,847 AGranted
High definition television coder/decoder where synchronization is achieved via the addition of absolute time reference signals at the coder
AssigneeBritish Broadcasting Corporation
InventorsMichael James Knee, Nicholas Dominic Wells
Life of this patent
Estimating the term…
Abstract
In the combination of a video signal coder and a video signal decoder, synchronization is achieved by the addition of absolute time reference signals at the coder. These time reference signals are independent of the time base of the coder and are inserted after the coder buffer. At the decoder, the time reference signals are stripped out and used to set the decoder time base.
Claims3
A method of synchronizing a video signal decoder, comprising the steps of
- coding a signal for transmission in a coder having a coder buffer,
- generating a real time absolute reference signal,
- inserting the reference signal into the coded video signal after the coder buffer and prior to transmission independently of the time base of the coder,
- transmitting the video signal including the absolute reference signal in the received video signal, and
- setting a decoder time base in accordance with the detected absolute reference signal.
2 more elements
A video signal transmitter, comprising:
- a video signal source;
- a coder, having a time base, for coding the video signal for transmission, the coder having a coder buffer, means for generating an absolute reference signal;
- means for inserting the absolute reference signal into the coded video signal independently of the time base of the coder and after the coder buffer,
- and means for transmitting the coded video signal and the reference signal.
1 more element
A video signal receiver, comprising:
- means for receiving a transmitted video signal, including an absolute reference signal;
- a decoder, having a settable time base, for decoding the received video signal,
- means for detecting the absolute reference signal in the received video signal,
- means for setting the time base of the decoder in accordance with the detected absolute reference signal, and
- means for displaying the decoded video signal.
2 more elements
Dependencies are inferred from the claim text.