Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Seiichi Takeuchi

Masakazu Nishino

Yuji Fujiwara

Tatsuro Juri

Kazuhiro Wake

Shiro Kato

Shinya Kadono Kadono

Masaaki Kobayashi

Yoshitomi Nagaoka

Mitsuhiro Miyashita

Akifumi Ide

Keishi Okamoto

Toyohiko Matsuda

Shuichi Isota

Hiroko Uenaka

A video signal recording/playback apparatus displays a current playback position as a time difference from a current recording position in a simple form. The video signal recording/playback apparatus displays the playback position together with an entire scheduled recording time as a frame, thus allowing a user to acknowledge the current playback position with the current recording time.

Video signal recording/playback apparatus, video signal playback apparatus, and method of recording and playing back video signals

A video signal shuffling device forms a segment with blocks having a given offset value in horizontal and vertical directions from a given starting point uniquely determined on the screen, the offset value being identical in every region. The segment is formed in a unit of one frame or two frames. The shuffling device divides one frame comprising blocks into a plurality of regions. A coding device determines a final priority as well as a final quantizer thereby quantizing a segment and providing the segment with a variable-length-coding based on a first priority, coding-quantity obtained from a plurality of quantizers, second priority and a quantizer. A coding device and its decoder, the coding device carries out a hierarchical coding by only a motion vector in a compressed stream at a lower resolution side and by agreeing a motion detected and a DCT block size with a size on the screen.

Shuffling device, coding device, decoding device of video signal and medium recording the programs of shuffling, coding and decoding

A video signal layering-encoding system has at least either a frequency distribution unit to judge a frequency distribution in an input video signal or a motion judgment unit to judge the motion of an input video signal. With this, encoding quantity control according to the characteristics of the input video signal can be performed between layers. Also, with selection of encode modes and sharing of a motion vector, the encoded data of a bidirectionally predicted frame can be reduced and the encoding efficiency of a high resolution signal can be increased.

Apparatus of layered picture coding, apparatus of picture decoding, methods of picture decoding, apparatus of recording for digital broadcasting signal, and apparatus of picture and audio decoding

The present invention includes a motion vector detector for detecting motion vectors using a first image signal of high resolution; a resolution reducer for creating a second image signal of low resolution from the first image signal; an image signal interpolater for interpolating the second image signal so that it has the same number of pixels as the first image signal, thereby creating an interpolated signal; a differentiator for determining a differential between the first image signal and the interpolated signal; and an encoder for using the motion vectors to high-efficiency-encode the differential signal. Thus, by encoding two types of image signals of different resolutions, the present invention improves the accuracy of the motion vectors during the encoding of the high-resolution signal and reduces the rate after encoding due to the encoding of the differential signal.

Method and apparatus for transmitting, encoding and decoding video signal and recording/reproducing method of optical disc

A video signal coding device is provided with unit dividing means ( ) for dividing an input picture into units each of which is a coding quantity control unit consisting of one or a plurality of frames to be processed by any one of intra-frame coding, inter-frame forward coding, and inter-frame bidirectional coding; activity calculating means ( ) for calculating a frame activity for every frame of the input picture, and calculating a unit activity for every unit from the frame activities of frames belonging to the same unit; target coding quantity deciding means ( ) for deciding a target coding quantity of a coding frame on the basis of the frame activity of the coding frame which is a coding object, the unit activity of a coding unit to which the coding unit belongs, and the average unit activity of a unit prior to the coding unit; and coding means ( ) for coding the coding frame by the target coding quantity so as to generate coded data.

Video signal coding method and coding device adapted to control code amounts according to the characteristics of pictures

A video signal coding device is provided with unit dividing means ( ) for dividing an input picture into units each of which is a coding quantity control unit consisting of one or a plurality of frames to be processed by any one of intra-frame coding, inter-frame forward coding, and inter-frame bi-directional coding; activity calculating means ( ) for calculating a frame activity for every frame of the input picture, and calculating a unit activity for every unit from the frame activities of frames belonging to the same unit; target coding quantity deciding means ( ) for deciding a target coding quantity of a coding frame on the basis of the fame activity of the coding frame which is a coding object, the unit activity of a coding unit to which the coding unit belongs, and the average unit activity of a unit prior to the coding unit; and coding means ( ) for coding the coding frame by the target coding quantity so as to generate coded data.

Video signal coding method and device adapted to control code amounts according to the characteristics of pictures

A video signal recording apparatus including a switching device for receiving a digital progressive scan TV signal having a frame cycle which is &frac12; of the frame cycle of an interlaced scan TV signal and switching the progressive scan TV signal frame by frame alternately; a coding device for performing high-rate coding of data corresponding to one frame of the progressive scan TV signal to the same code amount as obtained by high-rate coding of data corresponding to one frame including two successive fields of an interlaced scan standard-definition TV signal; and a recording device for recording the data processed with the high-rate coding in the same number of tracks as the data corresponding to one frame of the interlaced scan standard-definition TV signal.

High efficiency coding device and high efficiency coding method for image data

A video signal coding apparatus comprises a divider that divides an input digital video signal into an effective area and an additional area, an effective-area blocking device for dividing the effective area into effective blocks, an effective-area encoder that hight-efficiency-codes the effective blocks to create effective compressed blocks, an additional-area encoder that hight-efficiency-codes the additional area to create additional compressed data, an additional-area blocking device for dividing the additional compressed data into additional compressed blocks each a luminance signal for a plurality of pixels and at least one color difference signal for pixels arranged at the same position as the plurality of pixels, and a substitution device that substitutes the additional compressed blocks for data in the same effective compressed blocks at predetermined positions.

Video signal coding apparatus

To a conventional video signal recording apparatus, there are added additional information generating means and data replacement means for replacing data at a specified position in compressed data with additional information generated by the additional information generating means. This enables to provide a video signal recording apparatus and a video signal regenerating apparatus which are able to increase transmissible information content, an image coding apparatus that executes high-efficiency non-linear quantization at a small circuit containing no quantization table and also prevents error propagation; and an image decoding apparatus for regenerating coded data obtained in the image coding apparatus.

Video signal recording apparatus and video signal regenerating apparatus

To a conventional video signal recording apparatus, there are added additional information generating means and data replacement means for replacing data at a specified position in compressed data with additional information generated by the additional information generating means. This enables to provide a video signal recording apparatus and a video signal regenerating apparatus which are able to increase transmissible information content; an image coding apparatus that executes high-efficiency non-linear quantization at a small circuit containing no quantization table and also prevents error propagation; and an image decoding apparatus for regenerating coded data obtained in the image coding apparatus.

Video signal recording apparatus, video signal regenerating apparatus, image coding apparatus and image decoding apparatus

A video signal recording apparatus including a switching device for receiving a digital progressive scan TV signal having a frame cycle which is 1/2 of the frame cycle of an interlaced scan TV signal and switching the progressive scan TV signal frame by frame alternately; a coding device for performing high-rate coding of data corresponding to one frame of the progressive scan TV signal to the same code amount as obtained by high-rate coding of data corresponding to one frame including two successive fields of an interlaced scan standard-definition TV signal; and a recording device for recording the data processed with the high-rate coding in the same number of tracks as the data corresponding to one frame of the interlaced scan standard-definition TV signal.

Video signal recording apparatus, video signal recording and

Video recording apparatus which accepts four different HDTV formatted

A filtering processor for performing filtering by use of an N-tap filter (N is a natural number) of this invention includes: means for transforming a first signal series having M.sub.1 signals (M.sub.1 is a natural number) into a second signal series having M.sub.2 signals (M.sub.2 is a natural number); and means for performing filtering on the second signal series to generate a third signal series having M.sub.3 signals (M.sub.3 is a natural number), wherein the second signal series is composed of the first signal series and signals of a predetermined value added to precede the start and follow the end thereof, and M.sub.1 signals among the M.sub.3 signals included in the third signal series is independent.

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Neyagawa, Japan

Seiichi Takeuchi