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    74.
    发明专利
    未知

    公开(公告)号：DE69133131D1

    公开(公告)日：2002-11-14

    申请号：DE69133131

    申请日：1991-11-19

    Applicant: CANON KK

    Inventor： NAGASAWA KENICHI ,  TAKAHASHI KOJI ,  SATO CHIKARA

    IPC: H04N5/765 ,  G11B20/02 ,  G11B27/024 ,  H04N5/225 ,  H04N5/265 ,  H04N5/77 ,  H04N5/7826 ,  H04N5/91 ,  H04N5/92 ,  H04N9/82

    Abstract: A video signal recording apparatus has an overlap function of gradually switching a video signal read from a memory (10) capable of storing a one-picture portion of an input video signal to another video signal during a first predetermined time period. The apparatus can effectively utilize the overlap function with a simple operation by operating a manual operation member for setting the apparatus to an overlap mode for operating the overlap function when a recording operation is not performed, and thereby confirming an image stored in the memory. When the apparatus is in an interval recording mode in which a recording means periodically operates during every second predetermined time period, the first and second predetermined time periods are determined so that the second predetermined time period is longer than the first predetermined time period when the apparatus is set to the overlap mode. Recording of an imperfect image is thereby prevented.

    75.
    发明专利
    未知

    公开(公告)号：DE69232123T2

    公开(公告)日：2002-05-02

    申请号：DE69232123

    申请日：1992-01-31

    Applicant: CANON KK

    Inventor： ENARI MASAHIKO ,  NAGASAWA KENICHI ,  SHIKAKURA AKIHIRO ,  KANEKO YUUSHI ,  SATAKE YOSHIFUMI ,  TAKIZAWA HIROSHI

    IPC: G06T9/00 ,  H04N7/26 ,  H04N7/30

    Abstract: In an image encoding apparatus, conversion data obtained by converting image information onto a frequency region (26-30), and corresponding to several frames are parallelly output using a one-frame period delay circuit (34a-34d). The parallelly output conversion data are quantized by a quantization circuit (32a-32d), and a data amount to be obtained when the quantized data are encoded is obtained by a variable-length coding circuit (40a-40d). The data amount information is input to a coefficient operation circuit (44a-44d) for determining a quantization step of the next stage. Conversion data quantized (32e) according to an output from the coefficient operation circuit (38e) are encoded (40e), and the encoded data are output.

    76.
    发明专利
    未知

    公开(公告)号：DE69232123D1

    公开(公告)日：2001-11-15

    申请号：DE69232123

    申请日：1992-01-31

    Applicant: CANON KK

    Inventor： ENARI MASAHIKO ,  NAGASAWA KENICHI ,  SHIKAKURA AKIHIRO ,  KANEKO YUUSHI ,  SATAKE YOSHIFUMI ,  TAKIZAWA HIROSHI

    IPC: G06T9/00 ,  H04N7/26 ,  H04N7/30

    Abstract: In an image encoding apparatus, conversion data obtained by converting image information onto a frequency region (26-30), and corresponding to several frames are parallelly output using a one-frame period delay circuit (34a-34d). The parallelly output conversion data are quantized by a quantization circuit (32a-32d), and a data amount to be obtained when the quantized data are encoded is obtained by a variable-length coding circuit (40a-40d). The data amount information is input to a coefficient operation circuit (44a-44d) for determining a quantization step of the next stage. Conversion data quantized (32e) according to an output from the coefficient operation circuit (38e) are encoded (40e), and the encoded data are output.

    77.
    发明专利
    未知

    公开(公告)号：DE69231825D1

    公开(公告)日：2001-06-21

    申请号：DE69231825

    申请日：1992-05-15

    Applicant: CANON KK

    Inventor： IWABUCHI YOSHITSUGU ,  NAGASAWA KENICHI

    IPC: H04N7/26 ,  H04N7/30 ,  H04N7/52 ,  H04N7/54 ,  H04N7/56

    Abstract: There is provided an encoding apparatus provided with a quantization unit for quantizing image information, a generation unit for generating coefficient information for determining the quantizing steps of the quantization unit, an encoding unit for effecting variable length encoding on the data quantized by the quantization unit, a dividing unit for dividing the image information of a picture into plural blocks, and a transmission unit for effecting transmission by adding the coefficient information to each block divided by the dividing unit. Also there is provided a decoding apparatus for reproducing image information from a data train transmitted in the unit of a data frame containing a code obtained by quantizing image information and encoding thus quantized data, and coefficient information relating to the steps of quantization and determined for each picture, comprising a decoding unit for decoding the code, a detection unit for detecting an error in the coefficient information, and a replacement unit for replacing the information in the data frame with information of another data frame, based on the output of the detection unit.

    78.
    发明专利
    未知

    公开(公告)号：DE69231426D1

    公开(公告)日：2000-10-12

    申请号：DE69231426

    申请日：1992-01-31

    Applicant: CANON KK

    Inventor： ENARI MASAHIKO ,  NAGASAWA KENICHI ,  SHIKAKURA AKIHIRO ,  KANEKO YUUSHI ,  SATAKE YOSHIFUMI ,  TAKIZAWA HIROSHI

    IPC: G06T9/00 ,  H04N7/26 ,  H04N7/30

    Abstract: In an image encoding apparatus, conversion data obtained by converting image information onto a frequency region (26-30), and corresponding to several frames are parallelly output using a one-frame period delay circuit (34a-34d). The parallelly output conversion data are quantized by a quantization circuit (32a-32d), and a data amount to be obtained when the quantized data are encoded is obtained by a variable-length coding circuit (40a-40d). The data amount information is input to a coefficient operation circuit (44a-44d) for determining a quantization step of the next stage. Conversion data quantized (32e) according to an output from the coefficient operation circuit (38e) are encoded (40e), and the encoded data are output.

    80.
    发明专利
    未知

    公开(公告)号：DE3856318T2

    公开(公告)日：1999-09-23

    申请号：DE3856318

    申请日：1988-10-17

    Applicant: CANON KK

    Inventor： AOKI AKIO ,  NAGASAWA KENICHI

    IPC: H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/46 ,  H04N7/24

    Abstract: A predictive coding system is disclosed wherein an input data sequence (at a) sequentially including a number of samples (at b to d) is subjected to time-base expansion (at e to g) by n times, where n is an integer not smaller than 2, using an interval of a predetermined period including a plurality of samples as a unit to form n-channel data sequences, and said n-channel data sequences are input in n predictive coding means (6 to 8) in parallel. The coded sequences may then be time-base compressed and then multiplexed (at h). A decoding system may operate in a somewhat similar manner.

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