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Inventor:
Iwamura; Ryuichi
Address:
Tokyo, JP
No. of patents:
23
Patents:




Patent Number Title Of Patent Date Issued
RE38621 OPTICAL DISK HAVING A PARTICULAR FORMAT TO STORE USER-SELECTED DATA, SUCH AS COMPRESSED VIDEO DA October 12, 2004
An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks
RE38502 Method and apparatus for recovering TOC and user information from an optical disk and using the April 20, 2004
An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks
RE38481 Method and apparatus for recording MPEG-compressed video data and compressed audio data on a dis March 30, 2004
Method and apparatus for recording MPEG-compressed video data end compressed audio data on an optical disk having a diameter leas than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and
6064435 Motion picture signal compressing apparatus which encodes the motion vector of the block of a mo May 16, 2000
An apparatus is for compressing a motion picture signal. The apparatus includes a motion detection block; a difference determination block; an orthogonal transform block; a quantizing block; a local decoding block; a motion vector encoding block; and a motion compensating block. Sign
5999225 Caption display method for using digital video system December 7, 1999
A method and apparatus for encoding signals so as to form a multiplexed signal and for decoding the same. The apparatus may include an encoding unit and a decoding unit. The encoding unit may include a device for encoding a dynamic image signal so as to form a video bit stream, a device
5987214 Apparatus and method for decoding an information page having header information and page data November 16, 1999
Apparatus and method for decoding pages of subtitle data supplied as information pages which include respective headers and page data (i.e., subtitle character data) which are superimposed on a video signal. Each received information page is stored in a ring-type memory as a respective
5745505 Digital signal encoding method and apparatus, digital signal recording medium, and digital signa April 28, 1998
The present invention provides digital signal encoding method and apparatus, a digital signal recording medium, and digital signal decoding method and apparatus which improve error correcting capabilities and reduce redundancy with a simple structure when the digital signal is encode
5734787 Optical disk having a particular format to store user-selected data, such as compressed video da March 31, 1998
An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks
5715355 Optical disk having a particular format to store user-selected data, such as video data or compu February 3, 1998
An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks
5715354 Image data regenerating apparatus February 3, 1998
The present invention is intended to enable smooth reverse regeneration of image data while minimizing a large-sized and expensive configuration of an apparatus according to the present invention. Compression-coded image data recorded on an optical disc 1 is regenerated and stored in a r
5677901 Methods and appartus for reproducing and decoding data recorded on a disk October 14, 1997
The present invention relates to methods and apparatus for reproducing encoded data recorded on a disk and decoding the reproduced encoded data. The data reproduced from the disk in encoded form are stored in a buffer and read from the buffer for carrying out error correction. Once the d
5623459 Method and apparatus for error correcting reproduced data April 22, 1997
Data is recorded onto optical disc 1 with double parity of inner parity and outer parity being added thereto. Inner parity is added to data which has been caused to undergo interleaving processing and is used for correction of inner code. Outer parity is added to data which is not caused
5617384 Method and apparatus for recovering TOC and user information from an optical disk and using the April 1, 1997
An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks
5596565 Method and apparatus for recording MPEG-compressed video data and compressed audio data on a dis January 21, 1997
Method and apparatus for recording MPEG-compressed video data and compressed audio data on an optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and
5592450 Method for reproducing compressed information data from a disk using a spatial frequency less th January 7, 1997
Method and apparatus for reproducing MPEG-compressed video data and compressed audio data from an optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information
5544263 Motion vector calculation circuit, with flatness-judgement circuitry, that selects a generated m August 6, 1996
A circuit calculates motion vectors for use in compressing a motion picture signal. The motion picture signal is divided into portions, each portion representing a picture. The portions include a current portion representing a current picture. The current portion is subdivided into b
5534928 Apparatus and method for decoding a plurality of encoded video signals July 9, 1996
An apparatus for decoding a plurality of video signals each encoded by one of intra-coding (I), predictive-coding (P) and bidirectionally-predictive coding (B). Errors in the encoded video signals are detected and determined to be either correctable or uncorrectable. The errors deter
5512952 Picture signal encoding and/or decoding apparatus April 30, 1996
Apparatus for compressing a motion picture signal divided into blocks, in which circuits perform the following operations: subtracting the blocks of the motion picture signal from corresponding prediction blocks of a prediction picture to provide prediction error blocks. Orthogonally
5510841 Encoding apparatus in which flat subblocks are identified in blocks of a motion signal prior to April 23, 1996
In a picture signal encoding and/or decoding apparatus, respective blocks composing of 8.times.8 pixels are segmented into four subblocks composing of 4.times.4 pixels. A flatness of picture data is judged for every subblock. New picture data is generated by folding flat subblocks in
5400076 Compressed motion picture signal expander with error concealment March 21, 1995
In a compressed motion picture signal expander, if the compressed motion picture signal includes an uncorrectable signal error, the resulting defective picture block can be replaced by a replacement picture block that blends in smoothly with the picture blocks surrounding it. Hence the
5386234 Interframe motion predicting method and picture signal coding/decoding apparatus January 31, 1995
An interframe motion predicting method for prediction of the motion in a bidirectionally predictive-coded frame from an intra-coded frame and a predictive-coded frame, predicts the motion in another bidirectionally predictive-coded frame from the preceding bidirectionally predictive-code
5343250 Multiple picture/sound signals decoding apparatus August 30, 1994
A multiple picture/sound signals decoding apparatus having a reduced-scale structure and capable of reproducing multiple moving pictures simultaneously on a single display device. For decoding input signals such as multiple moving picture signals and sound signals read out from a rec
5305113 Motion picture decoding system which affords smooth reproduction of recorded motion picture code April 19, 1994
In a motion picture decoding system, forward and reverse reproduction is carried out smoothly at a high speed without increasing an operation speed for decoding. When high speed reproduction from a record medium containing motion picture coded data is selected, a rate of data input is co


 
 
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