Record/reproduce apparatus having means for switching automatically between different types of audio
First Claim
1. Apparatus for recording and reproducing video and audio signals on a record medium, wherein the audio signal may be of at least two different types subjected to respectively different types of audio processing, said apparatus comprising:
- a recording section, including video signal supply means for supplying a video signal having blanking intervals therein;
FM modulating means for producing frequency modulated (FM) audio signal components;
level adjusting means for selectively adjusting the level of at least one FM audio signal component during blanking intervals as a function of the type of audio signal being modulated; and
combining means for combining the FM audio signal components and the video signal;
transducer means for recording the combined FM audio signal components and video signal on a record medium and for reproducing combined FM audio signal components and video signal from a record medium; and
a reproducing section including separating means for separating the reproduced FM audio signal components from the reproduced video signal;
level detecting means for detecting the level of at least one separated FM audio signal component during blanking intervals;
FM demodulating means for producing demodulated audio signals from the FM audio signal components; and
audio signal processing means responsive to the detected level of the separated FM audio signal component to process the demodulated audio signals in accordance with a selected type of audio processing.
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Abstract
Apparatus is provided for recording and reproducing video and audio signals on a record medium, wherein the audio signal may be of at least two different types subjected to respectively different types of audio processing. A recording section produces frequency modulated audio signal components and selectively adjusts the level of at least one FM audio signal component during the video blanking intervals as a function of the type of audio signal being modulated. Then, the FM audio signal components and the video signal are combined and recorded. A reproducing section separates the reproduced FM audio signal components from the reproduced video signal and detects the level of at least one separated FM audio signal component during blanking intervals. The FM audio signal components are demodulated and processed pursuant to a selected type of audio processing dependent upon the detected level of the FM audio signal component.
35 Citations
57 Claims
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1. Apparatus for recording and reproducing video and audio signals on a record medium, wherein the audio signal may be of at least two different types subjected to respectively different types of audio processing, said apparatus comprising:
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a recording section, including video signal supply means for supplying a video signal having blanking intervals therein;
FM modulating means for producing frequency modulated (FM) audio signal components;
level adjusting means for selectively adjusting the level of at least one FM audio signal component during blanking intervals as a function of the type of audio signal being modulated; and
combining means for combining the FM audio signal components and the video signal;transducer means for recording the combined FM audio signal components and video signal on a record medium and for reproducing combined FM audio signal components and video signal from a record medium; and a reproducing section including separating means for separating the reproduced FM audio signal components from the reproduced video signal;
level detecting means for detecting the level of at least one separated FM audio signal component during blanking intervals;
FM demodulating means for producing demodulated audio signals from the FM audio signal components; and
audio signal processing means responsive to the detected level of the separated FM audio signal component to process the demodulated audio signals in accordance with a selected type of audio processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. Apparatus for recording video and audio signals on a record medium, wherein the audio signal may be of at least two different types subjected to respectively different types of audio processing, said apparatus comprising video signal supply means for supplying a video signal having blanking intervals therein;
- FM modulating means for producing frequency modulated (FM) audio signal components;
level adjusting means for selectively adjusting the level of at least one FM audio signal component during blanking intervals to indicate the type of audio signal being modulated; and
combining means for combining the FM audio signal components and the video signal for recording. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
- FM modulating means for producing frequency modulated (FM) audio signal components;
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41. Apparatus for reproducing video and audio signals from a record medium, wherein the audio signals are recorded as FM audio signal components and may be of at least two different types subjected to respectively different types of audio processing and wherein the type of audio signal is indicated by the level of at least one of said FM audio signal components during an interval thereof corresponding to a blanking interval of said video signal, said apparatus comprising:
- separating means for separating reproduced FM audio signal components from reproduced video signals;
level detecting means for detecting the level of at least one separated FM audio signal component during blanking intervals;
FM demodulating means for producing demodulated audio signals from the FM audio signal components; and
audio signal processing means responsive to the detected level of the separated FM audio signal component to process the demodulated audio signals in accordance with a selected type of audio processing. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
- separating means for separating reproduced FM audio signal components from reproduced video signals;
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55. Apparatus for reproducing and demodulating frequency modulated luminance signals and frequency modulated audio signals that had been recorded on a record medium as mixed signals of respectively different frequency spectra, with the frequency modulated audio signals having an envelope whose level is selectively changed during vertical blanking intervals of the frequency modulated luminance signals, said apparatus comprising:
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low pass filter means for filtering the frequency modulated audio signals reproduced from said record medium; sampling means for sampling the frequency modulated audio signals reproduced from said record medium during said vertical blanking intervals; comparator means for comparing the filtered frequency modulated audio signals to the sampled frequency modulated audio signals; and switch means responsive to said comparator means for coupling demodulated audio signals through an audio signal processor when the filtered and sampled frequency modulated audio signals are of substantially equal levels, and for bypassing said audio signal processor when the filtered and sampled frequency modulated audio signals are of different levels.
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56. Apparatus for recording and reproducing video and audio signals on a record medium, comprising:
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a recording section, including video signal supply means for supplying a frequency modulated (FM) video component having blanking intervals therein;
audio signal supply means for supplying an audio signal;
FM modulating means for frequency modulating the audio signal;
level adjusting means for selectively adjusting the level of the frequency modulated (FM) audio signal during blanking intervals if the supplied audio signal is of a predetermined type; and
mixing means for frequency mixing the FM audio signal and the FM video component;transducer means for recording the frequency mixed FM audio signal and the FM video component on a record medium and for reproducing the frequency mixed FM audio signal and FM video component from a record medium; and a reproducing section including separating means for separating the reproduced FM audio signal from the reproduced FM video component;
envelope detecting means coupled to said separating means for detecting an envelope of the reproduced FM audio signal;
low pass filter means coupled to said envelope detecting means for filtering the FM audio signal envelope;
sampling means coupled to said envelop detecting means for sampling the FM audio signal envelope during blanking intervals of the reproduced FM video component;
comparator means for comparing the filtered envelope to the sampled envelope;
FM demodulating means for demodulating the FM audio signal;
audio signal processing means for processing the demodulated audio signal in accordance with said predetermined type of signal; and
switch means responsive to said comparator means for selecting the processed demodulated audio signal when the filtered and sampled envelopes are of substantially equal levels and for selecting the demodulated audio signal that is not processed by said audio signal processing means when the filtered and sampled envelopes are of different levels.
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57. Apparatus for recording video and audio signals on a record medium, comprising:
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video signal supply means for supplying a frequency modulated (FM) video component having blanking intervals therein; audio signal supply means for supplying first and second channels of audio signals; audio signal processing means for selectively processing the first and second channels of audio signals to produce first and second processed audio channels; frequency modulating means for modulating first and second carriers with said first and second channels of audio signals or with said first and second processed audio channels; switch means having a first state for supplying said first and second channels of audio signals to said frequency modulating means and a second state for supplying said first and second processed audio channels to said frequency modulating means; summing means for summing the modulated first and second carriers; level adjusting means coupled to said summing means for level adjusting the summed carriers only if said switch means admits of a predetermined one of its first and second states; and frequency mixing means coupled to said level adjusting means for frequency mixing the summed carriers and the FM video component for recording.
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Specification