Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1980-11-28
1985-10-22
Psitos, Aristotelis M.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358320, 358310, 360 32, 360 362, H04N 9491, H04N 944, H04N 578
Patent
active
045492271
ABSTRACT:
Apparatus for performing a method of recording a color video signal on a magnetic tape includes an analog-to-digital converter which samples the video signal at a frequency which is at least three times the color subcarrier frequency of the color video signal and converts the sampled color video signal to digital form; an interface which sequentially distributes the digitized samples to, for example, four channels, each channel including a time base compressor for compressing the digitized samples supplied thereto, an error control encoder for generating error control data from the respective compressed samples and adding the error control data thereto, and a recording processor for adding synchronizing, identifying and address signals to the compressed digitized samples supplied thereto and for code converting the digitized video signal in the form of 8-bit words to a respective 10-bit word code to reduce the low frequency components of the digitized video signal; and four recording transducers, each associated with one of the channels, for recording the digitized video signal from the four channels in a plurality of parallel tracks extending obliquely on the magnetic tape without guard bands between, preferably, any adjacent ones of the tracks and with the digitized video signal being recorded in alternate ones of the tracks with a first azimuth angle and the digitized video signal being recorded in the remaining alternate ones of the tracks with a second azimuth angle which is different from the first azimuth angle.
REFERENCES:
patent: 3812523 (1974-05-01), Narahara
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patent: 4167759 (1979-09-01), Tachi
patent: 4233621 (1980-11-01), Yamagiwa et al.
patent: 4277807 (1981-07-01), Baldwin
NHK Laboratories Nove. Ser. No. 221, Dec. 1977; Yokoyama et al., "PCM Video Recording Using a Rotating Magnetic Sheet".
"Digital Television at Reduced Bit Rates", Connor, SMPTE Journal, vol. 86, Nov. 1977.
"Digital Television Recording with Low Tape Consumption", Baldwin, IEE Conference Pub. No. 166, pp. 133-136, 1978.
"An Experimental Digital Videotape Recorder"; Yokoyama et al., SMPTE Journal, vol. 89, No. 3, Mar. 1980.
"Digital Video Recording-Some Experiments and Future Considerations"; Morizono et al., SMPTE Journal, vol. 89, No. 9, Sep. 1980.
Eguchi Takeo
Hashimoto Yoshitaka
Eslinger Lewis H.
Psitos Aristotelis M.
Sinderbrand Alvin
Sony Corporation
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