Apparatus for recording and reproducing caption information on an audio track of a video tape used in a video tape recorder
AssigneeSamsung Electronics Co., Ltd.
InventorHyeong-Deok Han
Life of this patent
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Abstract
An apparatus for recording and reproducing a caption signal on and from an audio track of a video tape, used in a video tape recorder. The apparatus includes a microprocessor, a character buffer, a recording code converter, a linear audio recording/reproducing circuit, a mode selector, a reproducing code converter, a Hi-Fi audio recording/reproducing circuit, an audio output controller, a video signal processor, and an on-screen-display circuit, whereby the caption character signal is recorded and reproduced by the audio head on and from the audio track of the video tape.
Claims12
An apparatus used in a video recorder, for recording and reproducing a caption signal comprised of a caption character display signal combined with a video signal, on an audio track of a video tape, said apparatus comprising:
- character buffer means for memorizing caption character data received from a keyboard, and for providing a monitor with said caption character data;
- processing means for converting said caption character data from said character buffer means to a pulse code signal during a caption recording mode;
- recording code converter means for converting said pulse code signal into a first mono-audio frequency signal during said caption recording mode;
- linear audio recording/reproducing means for recording said first mono-audio frequency signal on the video tape via a linear audio head, and for generating a processed mono-audio frequency signal by processing a reproduced mono-audio frequency signal received from said linear audio head;
- reproducing code converter means for converting said processed mono-audio frequency signal into rectangular pulses;
- said processing means for converting said rectangular pulses from said reproducing code converter means to reproduced caption character data during a caption reproducing mode;
- Hi-Fi audio recording/reproducing means for recording on the video tape a first Hi-Fi audio signal received from a buffer via a Hi-Fi audio head and for generating a processed Hi-Fi audio signal by processing a reproduced Hi-Fi audio signal received from said Hi-Fi audio head;
- output controller means for enabling transmission of said processed mono-audio frequency signal and said processed Hi-Fi audio signal from said linear audio recording/reproducing means and said Hi-Fi audio recording/reproducing means, respectively, to an output port;
- mode selector means for enabling transmission of said first mono-audio frequency signal from said recording code converter means to said linear audio recording/reproducing means during said caption recording mode, and for enabling transmission of said processed mono-audio frequency signal from said linear audio recording/reproducing means to said reproducing code converter means during said caption reproducing mode;
- video signal processor means for processing said video signal;
- and
- on-screen-display means for generating said caption signal, thereby enabling a visual display of a caption, in dependence upon said reproduced caption character data received from said processing means and said video signal from said video signal processor means.
An apparatus for recording and reproducing a caption signal comprised of a character signal combined with a video signal, on an audio track of a video tape, said apparatus comprising:
- input means for inputting character data;
- buffer means for storing said character data;
- processing means for receiving said character data from said buffer means and converting said character data into a pulse code signal during a caption recording mode;
- recording conversion means for converting said pulse code signal into a first mono-audio signal;
- reproducing conversion means for converting a reproduction mono-audio signal into a rectangular pulse signal;
- means for recording said first mono-audio signal onto said audio track of the video tape during said caption recording mode, and for producing said reproduction mono-audio signal from the audio track during a caption reproducing mode;
- said processing means for converting said rectangular pulse signal to said character signal during said caption reproducing mode, wherein said character signal comprises said character data, a clock signal and a chip selection signal;
- means for recording a stereo signal on the video tape, and for reproducing said stereo signal from the video tape;
- means for receiving said reproduction mono-audio signal during a mode different from said caption recording mode and said caption reproducing mode, and for receiving said stereo signal, to transmit said reproduction mono-audio signal and said stereo signal to an output port;
- video signal processor means for receiving said video signal;
- and
- on screen display means for generating said caption signal.
A method of recording caption data comprised of a reproduced caption signal combined with a video signal, on an audio track of a video tape and displaying said caption data with a video signal, said method comprising:
- converting said caption data to a pulse code signal during a caption recording mode;
- converting said pulse code signal to a first mono-audio signal during said caption recording mode;
- recording said first mono-audio signal on the audio track of the video tape during said caption recording mode;
- reproducing said first mono-audio signal from the audio track of the video tape during a caption reproducing mode;
- converting said first mono-audio signal reproduced from the audio track to a rectangular pulse signal during said caption reproducing mode;
- converting said rectangular pulse signal to said reproduced caption signal during said caption reproducing mode;
- generating a display signal during said caption reproducing mode by generating said caption data;
- and
- displaying a caption on a visual display during said caption reproducing mode, with content of said caption depending upon said display signal.
Dependencies are inferred from the claim text.