PCM Signal processing circuit
First Claim
1. A PCM signal processing circuit comprising, a signal input terminal for receiving a PCM data signal from PCM data signal reproducing apparatus, a memory for storing said PCM data signal and to be designated an address thereof to be written by an address signal being produced with regard to said PCM data signal, a standardized signal input terminal for receiving a standardized signal corresponding to a synchronizing signal for synchronizing said PCM data signal reproducing apparatus, an address counter for designating an address of said memory to be read, and means for providing said address counter with preset data in response to said every standardized signal as a load signal so that said address counter begins counting read pulses synchronized with said standarized signal from said preset data.
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Abstract
A PCM signal processor having a signal input terminal which receives a PCM data signal, a memory for storing the PCM data signal, a standardized signal input terminal for providing a standardized signal corresponding to a synchronizing signal for synchronizing the PCM data signal reproducing apparatus, an address counter for designating the address of the memory which is to be read and means for providing said address counter with preset data in response to the standardized signal.
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Citations
14 Claims
- 1. A PCM signal processing circuit comprising, a signal input terminal for receiving a PCM data signal from PCM data signal reproducing apparatus, a memory for storing said PCM data signal and to be designated an address thereof to be written by an address signal being produced with regard to said PCM data signal, a standardized signal input terminal for receiving a standardized signal corresponding to a synchronizing signal for synchronizing said PCM data signal reproducing apparatus, an address counter for designating an address of said memory to be read, and means for providing said address counter with preset data in response to said every standardized signal as a load signal so that said address counter begins counting read pulses synchronized with said standarized signal from said preset data.
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2. A PCM signal processing circuit comprising, a signal input terminal for receiving a PCM data signal, PCM data signal reproducing apparatus, a memory for storing said PCM data signal, a standarized signal input terminal for providing a standarized signal as a synchronizing signal for synchronizing said PCM data signal reproducing apparatus, an address counter for designating an address of said memory to be read, and means for providing said address counter with preset data in response to said standardized signal, phase comparing means for comparing a word clock signal which is being synchronized to said standardized signal with another word clock signal which controls said memory in phase and for generating a detecting signal when phase synchronizing of said word clock signals is obtained, and control means for controlling so that said preset data is loaded into said address counter in response to said detecting signal.
- 5. A PCM signal processing circuit comprising, a reproducing video recorder, a data extracting circuit and a synchronizing signal separator circuit receiving outputs of said reproducing video recorder, a recording clock signal generator supplying a sync signal to said reproducing video recorder, a word selector connected to the output of said data extracting circuit, a memory receiving the output of said word selector, a first counter, a first comparator receiving inputs from said first counter, a first switch for connecting in a first position the output of said recording clock signal generator to said first comparator, a crystal oscillator, a controllable counter receiving inputs from said first comparator, a second switch which in a first position supplies the output of said crystal oscillator to said controllable counter, said first counter connected to receive an output of said controllable counter, and a read/write controller receiving an output from first counter and supplying inputs to said memory.
Specification