Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent
1995-02-07
1996-02-20
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Signal switching
360 48, 360 103, 358335, G11B 509, G11B 1514
Patent
active
054934567
ABSTRACT:
Method for increasing the recording time of a digital video tape recorder ("VTR") and for supporting multiple normal play modes of digital VTR operation, e.g., a standard play mode of operation and one or more long play modes of operation. To achieve long play mode operation data reduction is performed on a received full rate video data stream to generate a reduced rate video data stream. Data reduction is performed using data prioritization and selection, requantization of full rate data stream, and/or by selecting data to be included in the reduced rate data stream as a function of what portion of a video frame the data represents. The reduced rate data stream is generated to be compliant with the data format of the full rate data stream. During long play mode recording operation the data in the reduced rate data stream is recorded on a tape at the same tape data density as used during standard mode VTR operation. In accordance with each of the recording methods of the present invention the rotational rate of the digital VTRs headwheel is the same for both standard and long play modes of VTR operation. In addition, the present invention is directed to several methods of reading data from a tape at a reduced data rate.
REFERENCES:
patent: 3934268 (1976-01-01), Uemura
patent: 4031548 (1977-06-01), Kato et al.
patent: 4139867 (1979-02-01), Foerster
patent: 4193098 (1980-03-01), Bixby et al.
patent: 4263623 (1981-04-01), Woo et al.
patent: 4290087 (1981-09-01), Bixby et al.
patent: 4339775 (1982-07-01), Lemke et al.
patent: 4355324 (1982-10-01), Reitmeier
patent: 4392162 (1983-07-01), Yamamoto
patent: 4504869 (1985-03-01), Warren
patent: 4510538 (1985-04-01), Sato et al.
patent: 4541020 (1985-09-01), Kimura
patent: 4558376 (1985-12-01), Heitmann
patent: 4584613 (1986-04-01), Amari et al.
patent: 4636874 (1987-01-01), Hoogendoorn et al.
patent: 4636879 (1987-01-01), Narita et al.
patent: 4668998 (1987-05-01), Aoki
patent: 4783707 (1988-11-01), Nemoto et al.
patent: 4807053 (1989-02-01), Heijnemans
patent: 4825301 (1989-04-01), Pape et al.
patent: 4887169 (1989-12-01), Bannai et al.
patent: 4910605 (1990-03-01), Sasaki et al.
patent: 4985781 (1991-01-01), Hirasawa
patent: 5027235 (1991-06-01), Furuyama
patent: 5047869 (1991-09-01), Aoki et al.
patent: 5050014 (1991-09-01), Maeda et al.
patent: 5065259 (1991-11-01), Kubota et al.
patent: 5097363 (1992-03-01), Takei et al.
patent: 5119208 (1992-06-01), Fujimoto
patent: 5126852 (1992-06-01), Nishino et al.
patent: 5132807 (1992-07-01), Takimoto et al.
patent: 5134464 (1992-07-01), Basile et al.
patent: 5136391 (1992-08-01), Minami
patent: 5136394 (1992-08-01), Haikawa et al.
patent: 5140417 (1992-08-01), Tanaka et al.
patent: 5140437 (1992-08-01), Yonemitsu et al.
patent: 5144425 (1992-09-01), Joseph
patent: 5146337 (1992-09-01), Grubbs
patent: 5148272 (1992-09-01), Acampora et al.
patent: 5208673 (1993-05-01), Boyce
patent: 5212549 (1993-05-01), Ng et al.
patent: 5218449 (1993-06-01), Ko et al.
patent: 5225946 (1993-07-01), Uchiumi
patent: 5282049 (1994-01-01), Hatakenaka et al.
patent: 5291343 (1994-03-01), Goto
patent: 5355229 (1994-10-01), Arano et al.
patent: 5359471 (1994-10-01), Hasegawa
Lew B. Stelmach and Wa James Tam, "Viewing-based Image Coding For Advanced Television Systems", International Workshop on HDTV (1993).
Drafts of Recommendation H.262,ISO/IEC 13818-1 titled "Information Technology--Generic Coding of Moving Pictures and Associated Audio", (Nov. 1993 ISO-MPEG Committee draft).
Drafts of Recommendation H.262,ISO/IEC 13818-2 titled "Information Technology--Generic Coding of Moving Pictures and Associated Audio", (Nov. 1993 ISO-MPEG Committee draft).
Ho, Yo-Sung, et al. "MPEG-Based Video Coding for Digital Simulcasting," International Workshop on HDTV '92, Nov. 18-20, 1992, Proceedings vol. 1, pp. 141-148.
Robert Rast, Joseph Glaab, General Instrument Corporation, "Interoperability Considerations for Digi Cipher HDTV", Oct. 1, 1992.
Sun, H., et al. "Error Concealment in Digital Simulcast AD-HDTV Decoder," IEEE Transactions on Consumer Electronics, vol. 38, No. 3, Aug. 1992, pp. 108-118.
J. Lee, J. Seo, Y. Park, D. Youn, T. Oh, IEEE Transactions on Consumer Electronics, "A Study on New DCT-Based Bit Rate Reduction Algorithm and Variable Speed Playback for a Home-Use Digital VCR", vol. 38, No. 3, Aug. 1992, pp. 236-241.
Advanced Television Research Consortium, "Advanced Digital Television, Prototype Hardware Description", Feb. 12, 1992.
David Sarnoff Research Center, Philips Laboratories, "Advanced Digital Television, System Description", Jan. 20, 1992.
I.S.O. MPEG (Moving Pictures Expert Group), "Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to about 1.5 Mbit/s, Part 2 Video", 2-11172 rev 1, Nov. 23, 1991.
Zenith, AT&T, "Technical Details, Digital Spectrum Compatible", Sep. 23, 1991.
C. Yamamitsu, A. Ide, M. Nishino, T. Juri, H. Ohtaka, IEEE Transactions on Consumer Electronics, "A Study on Trick Plays for Digital VCR", vol. 37, No. 3, Aug. 1991, pp. 261-266.
S. Inoue, H. Kaneko, H. Takao, T. Fujii, M. Ishibashi, IEEE Transactions on Consumer Electronics, "New Method for Variable Speed Playback for High Definition VCRs", vol. 37, No. 3, Aug. 1991, pp. 244-251.
General Instrument Corporation Videocipher Division, "Digicipher HDTV System Description", Document No. 62004, Aug. 22, 1991.
Richard Brush, "Design considerations for the D-2 NTSC composite DNTR", pp. 182-193, SMPTE Journal, Mar. 1988.
S. Lipshitz, J. Vanderkooy, "Digital Dither", Journal Audio Eng Soc.; vol. 34, No. 12, p. 1030, (Dec. 1986).
N. S. Jayant and P. Noll, Digital Coding of Waveforms, Prentice-Hall, 1984, pp. 164-170.
N. S. Jayant and L. R. Rabiner, "The Application of Dither to the Quantization of Speech Signals," Bell System Technical Hournal, pp. 1293-1304, Jul.-Aug. 1972.
Augenbraun Joseph E.
Boyce Jill M.
Pearlstein Larry A.
Hitachi America Ltd.
Sniezek Andrew L.
Wamsley Patrick
LandOfFree
Method and apparatus for increasing the recording time of a digi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for increasing the recording time of a digi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for increasing the recording time of a digi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1360842