System for recording and reproducing a wide band signal
Abstract
Abstract A TAPE RECORDER HAS THE CAPABILITY OF RECORDING A PREDETERMINED BAND WIDTH OF SIGNALS WHICH IS NOT AS WIDE AS A TV BAND WIDTH. TO RECORD A TV BAND, THE SIGNALS ARE DIVIDED INTO HIGH AND LOW COMPONENT BAND. THE HIGH FREQUENCY BAND COMPONENT IS RECORDED DIRECTLY ON THE RECORDING MEDIUM, AND THE LOW FREQUENCY BAND COMPONENT IS FREQUENCY MODULATED ON A CARRIER WAVE WITH AN INDEX OF MODULATION WHICH IS OVER UNITY. THE LOWER FREQUENCY LIMIT OF THE DEVIATED CARRIER WAVE IS SUBSTANTIALLY EQUAL TO OR HIGHER THAN THE HIGHEST FREQUENCY COMPONENT OF THE WIDE-BAND SIGNAL. THE FREQUENCY MODULATED CARRIER WAVE IS RECORDED ON THE RECORDING MEDIUM AT A LEVEL AT WHICH IT ACTS AS A BIAS SIGNAL WITH RESPECT TO THE HIGH FREQUENCY BAND COMPONENT. THE ORIGINAL WIDE-BAND SIGNAL IS REPRODUCED FROM THE RECORDING MEDIUM DURING PLAYBACK WHEN THE COMPONENT BANDS ARE SEPARATED, DEMODULATED, AND RECOMBINED. THE HIGH FREQUENCY BAND COMPONENT PLAYED BACK FROM THE RECORDING MEDIUM IS CONTROLLED BY OTHER FREQUENCY COMPONENT PLAYED BACK AT THE SAME TIME SO THAT THE LEVEL VARIATIONS OF THE HIGH FREQUENCY BAND COMPONENT IS CORRECTED.
Inventors
- 👤 T Suzuki
- 👤 Y Ota
Bibliographic Details
Claims Analysis
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