Digitized analog TV signal processing system
AssigneeMediatek Inc.
InventorsMing-Luen Liou, Ray-Kuo Lin, Yi-Fu Chen
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Abstract
A digitized analog television signal processing system is disclosed, comprising an analog-to-digital converter, a demodulation unit, a decoding unit, and a control unit. The analog-to-digital converter samples a television signal comprising a video signal. The demodulation unit demodulates the video signal. The decoding unit decodes the demodulated video signal. The control unit adjusts the demodulation unit according to a signal quality indicator generated during and/or after the decoding of the decoding unit.
Claims18
A digitized analog television signal processing system, comprising:
- an analog-to-digital converter configured to sample a television signal comprising a video signal;
- a demodulation unit configured to demodulate the video signal, wherein the television signal further comprises a sound signal, the demodulation unit comprises a filter bank configured to separate the video signal and the sound signal from the television signal;
- a decoding unit configured to decode the demodulated video signal;
- and
- a control unit configured to adjust the demodulation unit according to a signal quality indicator generated during and/or after the decoding of the decoding unit,
- wherein the digitized analog television signal processing system further comprises a sound processing unit configured to demodulate and/or decode the sound signal, the signal quality indicator is further generated during and/or after the processing of the sound processing unit,
- wherein the signal quality indicator comprises a signal-to-noise ratio (SNR) of the video signal, the control unit is configured to make a bandwidth of the filter bank reduced when the SNR is lower than a threshold.
A digitized analog television signal processing system, comprising:
- an analog-to-digital converter configured to sample a television signal comprising a video signal;
- a demodulation unit configured to demodulate the video signal, wherein the television signal further comprises a sound signal, the demodulation unit comprises a filter bank configured to separate the video signal and the sound signal from the television signal;
- a decoding unit configured to decode the demodulated video signal;
- and
- a control unit configured to adjust the demodulation unit according to a signal quality indicator generated during and/or after the decoding of the decoding unit;
- wherein the digitized analog television signal processing system further comprises a sound processing unit configured to demodulate and/or decode the sound signal, the signal quality indicator is further generated during and/or after the processing of the sound processing unit
- wherein when the signal quality indicator indicates that a sound carrier of the sound signal is different from a presumed sound carrier, the control unit is configured to make a passband center of the filter bank shifted from the presumed sound carrier to the sound carrier.
Dependencies are inferred from the claim text.