Patents Examined by Thai O. Tran
  • Patent number: 5627935
    Abstract: The error-correction coding function of an SD-VCR for recording and reproducing an ATV signal is modified to exclude trick-play data from outer error-correction coding in two-dimensional Reed-Solomon coding of normal play data, to improve error-correcting capability for the normal-play data. The same error-correction coding used as inner error-correction coding in the two-dimensional Reed-Solomon coding of normal play data is performed on the trick-play data as well as on the outer error-correction coded normal-play data. The resulting inner codes are preferably diagonal-scan interleaved before recording, at least for the normal-play data. During reproduction, after de-interleaving when interleaving was performed during recording, the inner error-correction coded data are decoded and separated into trick-play data and outer error-correction coded normal-play data. Outer error-correction coded normal-play data are decoded during normal play.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: May 6, 1997
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tae-eung Kim
  • Patent number: 5587806
    Abstract: An apparatus records and reproduces high efficiency coded video signal to and from a recording medium and includes an important data generating circuit for generating at least an important data from an input video signal, a data arranging circuit for arranging the important data so as to be recorded at predetermined positions, and a recording and reproduction control circuit for controlling recording and reproducing operations. The input video signal is separated into information common to each large block and information native to small blocks of the each large block. A coding mode of each of the small blocks thus separated is judged. The input video signal is divided into a plurality of packets, data for generating a common information from the input video signal is decoded, the common information thus generated is stored at a predetermined position of a packet, and each packet is sequentially recorded on a recording medium.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: December 24, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masazumi Yamada, Shinya Kadono, Shiro Kato
  • Patent number: 5565998
    Abstract: An apparatus for identifying automatically from an interlaced video recording the frames of an original cine-film sequence from which the video recording has been derived. The apparatus includes an evaluation for evaluating, for each successive pair of fields, a function measuring correlation between adjacent odd and even picture lines taken from the first and second fields of the pair, respectively; a comparator for comparing the correlation function of each field pair with that of at least one neighboring pair in the sequence; and a selector for identifying pairs with greater correlation than their neighbors as being derived from the same original film frame. The original frames are reconstructed and fed to an MPEG motion picture encoder to obtain high quality compressed video, Also provided is automatic scene cut detection which allows adaptive operation of the MPEG encoder.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: October 15, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Glenn R. Coombs, Derek Andrew, Octavius J. Morris
  • Patent number: 5526132
    Abstract: The present invention provides an inexpensive video editing system capable of combining three or more shots simultaneously, and a time-saving method thereof.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: June 11, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Rumi Tsubota, Kazuo Kajimoto
  • Patent number: 5526135
    Abstract: A recording and/or reproducing apparatus for grouping input video data at an interval of a predetermined number of pixels and encoding each block by a DCT circuit, a quantization circuit and an entropy encoding circuit, recording the encoded data on a magnetic tape, and reproducing the magnetic tape for producing block-by-block data, which is decoded to produce output video data, includes a filtering circuit for reducing horizontal and vertical frequency components generated by repetitive occurrences of the respective data blocks. For a differential speed playback mode, such as shuttle playback, the video data reproduced and decoded during the differential speed playback mode is passed through the filtering circuit for producing a satisfactory playback image in which block components are suppressed even for the differential speed playback mode.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: June 11, 1996
    Assignee: Sony Corporation
    Inventor: Nobuhiro Chiba
  • Patent number: 5521714
    Abstract: In a rotary head type reproducing apparatus, such as a digital audio tape recorder (DAT), a display changeover operation, a key scanning operation or a sensor scanning operation is inhibited during the periods T.sub.PB-A, T.sub.PB-B when a rotary head is in contact with a magnetic tape for reproducing signals, and the display changeover operation is performed during time periods T.sub.DS1 to T.sub.DS4 outside of these periods T.sub.PB-A, T.sub.PB-B, while the scanning operations are performed during a time period T.sub.SC. An error rate may be improved because noises due to display changeover or scanning may be eliminated during the time the magnetic head is contacted with the magnetic tape for signal reproduction. The result is that shielding or the like may be eliminated and the display section of switches may be mounted in proximity to the rotary head to reduce the size of weight of the apparatus.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: May 28, 1996
    Assignee: Sony Corporation
    Inventors: Masato Tanaka, Nobuhiko Watanabe
  • Patent number: 5519503
    Abstract: The picture data on the frequency space, compressed by discrete cosine transform (DCT), is variable length decoded by an inverse variable length encoding (IVLC) circuit 2. The inverse variable length coded picture data is processed by a decoding circuit 3 with an operation which is the reverse of re-quantization. The picture data, processed with the reverse operation of re-quantization, is processed by an near-linear inverse orthogonal transform (IDCT) circuit 4 with inverse orthogonal transform by approximation to a straight line. Respective elements of the picture data, grouped into blocks on the real space, are obtained by the near-linear IDCT circuit 4, and re-arranged in a block resolution circuit for producing replay picture data.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: May 21, 1996
    Assignee: Sony Corporation
    Inventor: Mitsuharu Ohki