Video signal recording and reproducing apparatus
First Claim
1. A video signal recording and reproducing apparatus comprising:
- receiving means for receiving a television signal;
image compression means for compressing an amount of information per unit time of the received continuous video signal;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal;
display means for displaying the restored video signal; and
control means for controlling the writing means and the reading means such that writing the video signal onto the hard disk apparatus and reading an arbitrary video signal, which was previously written onto the hard disk apparatus, from the hard disk apparatus are performed apparently simultaneously and continuously.
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Abstract
The video signal recording and reproducing apparatus of the invention includes: a receiving section for receiving a television signal; an image compression section for compressing an amount of information per unit time of the received continuous video signal; a writing section for intermittently writing a compressed video signal, obtained as an output of the image compression section, onto a hard disk apparatus via a magnetic head; a reading section for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head; a decoding section for restoring the read compressed video signal into an original video signal; a display section for displaying the restored video signal; and a control section for controlling the writing section and the reading section such that writing the video signal onto the hard disk apparatus and reading an arbitrary video signal, which was previously written onto the hard disk apparatus, from the hard disk apparatus are performed apparently simultaneously and continuously.
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Citations
22 Claims
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1. A video signal recording and reproducing apparatus comprising:
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receiving means for receiving a television signal;
image compression means for compressing an amount of information per unit time of the received continuous video signal;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal;
display means for displaying the restored video signal; and
control means for controlling the writing means and the reading means such that writing the video signal onto the hard disk apparatus and reading an arbitrary video signal, which was previously written onto the hard disk apparatus, from the hard disk apparatus are performed apparently simultaneously and continuously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A video signal recording and reproducing apparatus comprising:
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image compression means for digitizing an input continuous video signal and audio signal, thereby compressing an amount of information per unit time;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal; and
display means for displaying the restored video signal, thereby reading out predetermined video and audio signals at a predetermined time.
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16. A video signal recording and reproducing apparatus comprising:
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image compression means for digitizing an input continuous video signal and audio signal, thereby compressing an amount of information per unit time;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal;
display means for displaying the restored video signal; and
sound recognition means for recognizing an audio signal, wherein predetermined video and audio signals are read out at a point of time when the sound recognition means recognizes a predetermined sound.
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17. A video signal recording and reproducing apparatus comprising:
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image compression means for digitizing an input continuous video signal and audio signal, thereby compressing an amount of information per unit time;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal; and
display means for displaying the restored video signal, wherein a video signal at an arbitrary point of time is retrieved for an arbitrary time period by an operation of a viewer from video signals which are being received or video signals which were previously recorded, and information for prohibiting overwriting data of the retrieved video signal is added to the retrieved video signal so as to be stored into the hard disk apparatus. - View Dependent Claims (18, 19)
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20. A video signal recording and reproducing apparatus comprising:
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image compression means for digitizing an input continuous video signal and audio signal, thereby compressing an amount of information per unit time;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal; and
display means for displaying the restored video signal, wherein, while compressing a video signal which is being received and writing the compressed video signal onto the hard disk apparatus, a video signal which was previously recorded is read out and decoded into an original video signal, and wherein, after an amount of data of the decoded video signal has been reduced, the video signal is subjected to an image compression again and written onto the hard disk apparatus.
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21. A video signal recording and reproducing apparatus comprising:
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receiving means for simultaneously receiving television signals from a plurality of channels;
image compression means for compressing an amount of information per unit time of the received continuous video signals from the plurality of channels;
writing means for intermittently writing each compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal; and
display means for displaying the restored video signal, wherein, while compressing video signals from the plurality of channels which are being received and writing the compressed video signals onto the hard disk apparatus, a video signal which was previously recorded from a particular channel is read out.
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22. A video signal recording and reproducing apparatus comprising:
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receiving means for simultaneously receiving television signals from a plurality of channels;
synthesis means for synthesizing the received television signals from the plurality of channels into one screen;
image compression means for compressing an amount of information per unit time of the continuous video signal which has been synthesized by the synthesis means;
writing means for intermittently writing a compressed video signal, obtained as an output of the image compression means, onto a hard disk apparatus via a magnetic head;
reading means for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head;
decoding means for restoring the read compressed video signal into an original video signal; and
display means for displaying the restored video signal, wherein a plurality of video signals are synthesized into one screen, subjected to an image compression and then written onto the hard disk apparatus.
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Specification