Matsushita Electric Industrial Co., Ltd.

Yuji Fujiwara

Masakazu Nishino

Seiichi Takeuchi

Tatsuro Juri

Kazuhiro Wake

Shiro Kato

Mitsuhiro Miyashita

Toyohiko Matsuda

Masaaki Kobayashi

Akira Iketani

Tadashi Ono

Yoshitomi Nagaoka

Shigeru Awamoto

Toyohiko Matsuta

Yasuhiko Yamane

Akifumi Ide

Keishi Okamoto

Hiroyuki Uenaka

Youichi Amano

Toyohiko Matuda

Sigeru Awamoto

Shouichi Nishino

A signal recording apparatus includes a quantizer for quantizing a signal employing a quantization step. The apparatus further includes a quantization information creator for creating plural pieces of quantization information to specify the quantization step, an encoder for generating an encoded signal from the quantized signal, and a recorder for recording a compressed signal having data containing the plural pieces of quantization information and the encoded signal.

Signal recording apparatus and method, signal reproducing apparatus and method, medium, and information assembly

An image signal encoding device has at least encoding means of dividing a luminescence signal and color-difference signals of image signals into macro blocks having a plurality of sub macro blocks and encoding data of the macro blocks with use of any one of a plurality of compression modes of which compression rate is different each other,

Image signal encoding device and images signal encoding method

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

When recording/reproducing a digital video signal having 1080 effective lines, an MPEG stream can be extracted on the reproducing side with a simple structure and without causing serious deterioration of the image quality, and without wastefully consuming the capacity of the recording medium. To achieve this object, a macro block assembling circuit (semi-MPEG) in the compression circuit assembles macro blocks having 16 lines and macro blocks having 8 lines from the digital video signal. A DCT circuit (MPEG) applies field DCT or frame DCT defined by the MPEG standard to the macro blocks with 16 lines and applies only the frame DCT defined by the MPEG standard to the macro blocks with 8 lines.

Digital video signal recorder/reproducer and transmitter

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

A image signal processing apparatus and method for static image display are provided. Deformation at an edge of an image can be reduced by eliminating a temporal factor and vertical resolution can be retained even after data supplementation. In the process of compressing and decompressing interlace-scanned image data, one of two fields of a frame is selected by a field selector, image data is supplemented and reproduced based on the selected field data by a supplementor, and image data is outputted as a static image without deformation. As a result, more bits can be allocated for encoding by selecting and compressing one field data only and it leads to a higher quality image display. Furthermore, display deformation can be reduced by supplementing high frequency components as zero in the decompression processing.

Digital image data storage, data transfer and data broadcast apparatus and method

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

According to the present invention, a video signal recording apparatus for recording a digital video signal on a plurality of tracks on a magnetic medium is provided. Each of the tracks has a video data region and an auxiliary data region. In the video signal recording apparatus, the digital video signal is recorded on at least a part of the auxiliary data region.

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Nishinomiya, Japan

Yuji Fujiwara