Improvement of Picture Quality in Nonstandard Speed Play of a Digital VTR

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 101, No. 10, pp. 684–690
Abstract: In the nonstandard speed play of a composite videotape recorder (VTR), the reproduced video is converted to a standard TV signal, since fields in the reproduced video are skipped or repeated. In the field-conversion processing, a Y/C separation circuit and a line-interpolation circuit are used. In a conventional processor, the picture quality is deteriorated due to vertical displacement of the image and lower resolution. To remove these deficiencies a motion-adaptive field-conversion circuit, which uses interfield signals, has been developed. Based on these techniques, three kinds of gate arrays were developed and employed in a D-2 VTR for NTSC signals. Consequently, these problems were solved and the picture quality was remarkably improved.
Publication Date: 1992-10-01
DOI: 10.5594/J02202
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J02202
Author(s): H. OwashiImage & Media System Laboratory, Hitachi, Ltd., Yokohama, Japan
K. HosokawaImage & Media System Laboratory
K. YoshizawaImage & Media System Laboratory
Y. WatataniImage & Media System Laboratory
S. OhnoHDTV Systems Div., Hitachi, Ltd.
T. KawamuraHDTV Systems Div., Hitachi, Ltd., Tokyo, Japan
Copyright: © 1992 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Owashi H. , “An Integrated Digital Y/C Separator for S-VHS VCR,” Proc. of the IEEE , 1989, CICC, pp. 11.6.1 – 11.6.4 , May 1989 . EXTERNAL
2. Okada T. , “Flicker-free Non-Interlaced Receiving System for Standard Color TV Signals,” IEEE Trans. on CE , CE-31 : 240 – 254 , Aug. 1985 . EXTERNAL
3. Oldershaw R. , “Video Processing for a Composite Digital Video Tape Recorder,” Symposium Record, Broadcast Sessions, 17th International Television Symposium, Montreux, pp. 98 – 108 , June 1991 . EXTERNAL
4. Hirahata S. , “IDTV System Suitable for both Standard and Non-standard NTSC Signals,” ITEJ Technical Report , 12 : 13 – 18 , TEBS ′88-39, Nov. 1988 . EXTERNAL
5. Sugiyama M. , “High Quality Digital TV with Frame Store Processing,” IEEE Trans. on CE , CE-33 : 98 – 108 , Aug. 1987 . EXTERNAL

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H. Owashi, K. Hosokawa, K. Yoshizawa, Y. Watatani, S. Ohno, and T. Kawamura; Improvement of Picture Quality in Nonstandard Speed Play of a Digital VTR, SMPTE Journal ( Volume: 101, Issue: 10, October 1992); SMPTE, 1992. Available at https://doi.org/10.5594/J02202

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H. Owashi, K. Hosokawa, K. Yoshizawa, Y. Watatani, S. Ohno, and T. Kawamura; Improvement of Picture Quality in Nonstandard Speed Play of a Digital VTR, SMPTE Journal ( Volume: 101, Issue: 10, October 1992); SMPTE, 1992. Available at https://doi.org/10.5594/J02202

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<span class="citation">H. Owashi, K. Hosokawa, K. Yoshizawa, Y. Watatani, S. Ohno, and T. Kawamura; <cite>Improvement of Picture Quality in Nonstandard Speed Play of a Digital VTR</cite>, SMPTE Journal ( Volume: 101, Issue: 10, October 1992); SMPTE, 1992. Available at <a href="https://doi.org/10.5594/J02202" target="_blank" rel="noopener">https://doi.org/10.5594/J02202</a></span>

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H. Owashi, K. Hosokawa, K. Yoshizawa, Y. Watatani, S. Ohno, and T. Kawamura; <cite id="bib-10-5594-j02202">Improvement of Picture Quality in Nonstandard Speed Play of a Digital VTR</cite>, SMPTE Journal ( Volume: 101, Issue: 10, October 1992); SMPTE, 1992
<span class="doi">10.5594/J02202</span>
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