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Method and apparatus for recording HDTV signals having a wide bandwidth on a narrow bandwidth tape
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Inventors: Woo, Sang Joon; Jang, Kook Hyun; Yang, Tai Suk; Oh, Taik Sang;
Assignee: Goldstar Co., Ltd. (Seoul, KR)
Primary Examiner: Psitos; Aristotelis M.
Assistant Examiner: Cullen; Larry T.
Attorney, Agent or Firm:
A method of, and an apparatus for, the two-channel recording/playing back of signals in a VCR, wherein video data is divided into a signal with two channels to be recorded, so that HDTV signals can be recorded on a general S-VHS tape and played back therefrom. The apparatus includes: record system means for interleaving inputted data to divide it into two channels by adding dummy blocks and synchronizing blocks to the data at intervals of every two frames so as to record the data in two channels; playback system means for detecting data; and, synchronizing signal means for removing the dummy blocks and synchronizing blocks, based on the synchronizing signal, so as to format the data; means for combining and de-interleaving data of the two channels, and means for error-correcting and decoding the two channels. |
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DETAILED DESCRIPTION Therefore, an object of the invention is to provide a method of, and an apparatus for, two-channel recording/playing back of signals in a VCR, wherein video data is divided into a signal with two channels to be recorded, so that HDTV signals can be recorded on a general S-VHS tape and played back 5 therefrom.
Another object of the invention is to provide a method of, and an apparatus for, two-channel recording/playing back signals in a VCR, wherein dummy blocks in predetermined number are added to the start position and end position of each track, so that generation of errors upon head switching is prevented.
Another object of the invention is to provide a method of, and an apparatus for, two-channel recording/playing back signals in a VCR, wherein an addition of synchronizing blocks in a predetermined number is achieved at intervals of two frames so that the number of horizontal synchronizing blocks per track is constant, thereby eliminating a problem that data of one horizontal synchronizing block is recorded on different tracks, and thus correctly finding the position of each horizontal block without adding any separate synchronizing pattern and identification data.
In accordance with one aspect of the invention, the present invention provides a method for two-channel recording/playing back of signals in a digital video cassette recorder, comprising the steps of: recording data on a video tape in two channels, the recording step including the steps of interleaving data inputted, dividing the interleaved data into two channels by selecting them alternatingly, record formatting the data by adding dummy blocks and synchronizing blocks to the data by channels at intervals of two frames so as to make the number of blocks per track constant; and playing back the data recorded on the video tape separately in two channels, the playing-back step including the steps of demodulating two-channel data detected from the video tape upon playing-back, formatting the two-channel data by removing the dummy blocks and synchronizing blocks added upon recording, combining the formatted two-channel data and de-interleaving the combined data
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TV Signal 
