Kddi Corporation

Kokusai Denshin Denwa Kabushiki Kaisha

Kdd Corporation

Kddi R&d Laboratories, Inc.

Fujitsu Corporation

Ddi Corp.

Yasuyuki Nakajima

Hiromasa Yanagihara

Masaru Sugano

Akio Yoneyama

Kiyono Ujihara

Haruhisa Kato

Tamotsu Kanoh

Hironao Hori

Atsushi Koike

Yasuhiro Takishima

Yu Minakuchi

Masayuki Hashimoto

Kenji Matsuo

Satoshi Miyaji

Mitsuru Osawa

Tomoyuki Shimizu

A program for generating a significant video stream causes a computer to function as coding parameter extraction means for extracting a coding parameter of each macroblock for each frame from an original video stream, macroblock selection means for selecting a significant macroblock that has a coding parameter satisfying a predetermined condition, and significant video stream generation means for generating a significant video stream in which frames of the original video stream temporally synchronized with the frames of the coding parameter in the significant macroblocks are combined in time series.

Program, device, and method for generating significant video stream from original video stream

Input MPEG compressed data is input into a partial decoder and a logo insertion controller. A block DCT coefficients (a) output from the partial decoder is divided into a logo insertion region (c) and a non-logo insertion region (d) in a logo insertion region separator. Logo data (e) supplied from a logo information supply section is combined into the logo insertion region (c) with an arbitrary mixing ratio in a logo information insert section. In a logo region partial re-encoder, intra-frame coding of an image insertion region is executed when a starting frame for inserting an image is an intra-coded frame or a predictive coded frame, and, when the starting frame is a bidirectionally predictive-coded frame, inter-frame coding of the image insertion region is executed, and intra encoding of the image insertion region is executed in a frame to which the starting frame for inserting the image can refer.

Image insertion device for compressed video data

The present invention provides a scene classification apparatus for classifying uncompressed or compressed video into various types of scenes at low cost and with high accuracy using characteristics of a video and audio characteristics accompanied by the video. When video are compressed data, their motion intensity, spatial distribution of motion and histogram of motion direction are detected by using values of motion vectors of predictive coding images existing in respective shots, and the respective shots of the video are classified into a dynamic scene, a static scene, a slow scene, a highlight scene, a zooming scene, a panning scene, a commercial scene and the like based on the motion intensity, the spatial distribution of motion, the histogram of motion direction and shot density.

Scene classification apparatus of video

The picture input sectionfetches image data from the storage device, and then, inputs image data on sequential n images into the sectionfor measuring correlation between sequential images and the sectionfor measuring correlation between sampled images. The sectionfor measuring correlation between sequential images measures the correlation between sequential images based on video data. The sectionfor measuring correlation between sampled images measures the correlation between sub-sampled images. The short shot determining sectiondetermines short cut points by using the correlation between the sequential images and the correlation between the sub-sampled images. Otherwise, short cut points may be determined in consideration of motion amount between the sequential images or the sub-sampled images.

Picture searching apparatus

A first block size motion searching device () detects a motion vector with respect to each of blocks by a unit of variable blocks in the smallest first block size. A feature value extracting device () detects a feature value between the adjacent blocks. A motion search determining device () determines by utilizing the feature value whether or not the motion search should be executed in the second to nth block sizes. A search center generating device (), a search area generating device () and a selected block size motion searching device () selects the second to nth block sizes and detects the motion vector. A block size determining device () determines the block size having a high efficiency.

Motion vector detecting apparatus

The present invention intends to provide a classification apparatus for broadcasted sport videos for classifying various scenes constituting a sport video, depending on the importance level without being limited to any particular sport video by using visual and audio features. A sport video classification processing portion determines and classifies a play scene, a close-up shot and the like using an audio and a color feature extracted from motion picture data. Because the determination of the most frequent color can be changed adaptively for each inputted sport video, it is not necessary to determine any particular color to the most frequent color previously.

Classification apparatus for sport videos and method thereof

The present invention provides a real-time live picture information compression-transmission apparatus and method using a connection-less type protocol for a computer network. The compression-transmission apparatus is constituted to divide frame data output from a real-time encoder compressing live picture information into packets, and to transmit the live picture information in a real time manner according to the connection-less type protocol while suppressing burst transmission by conducting transmission control. The present invention also provides a compressed video data decoding apparatus capable of reducing compressed video decoding processing load without deteriorating picture quality and decreasing the number of played back picture planes when playing back a picture.

Apparatus and method for compression-transmitting and decoding picture information and storage medium stored its control programs

The present invention relates to the video playback unit of one or a plurality of videos, the delivery unit and the recording medium for recording the program of the processing of these units. The video playback unit of one video reads in order the video data of the video file from the storage unit. The display displays the video data, the time information sequence data and the still image sequence data positioned before and after the playback time of the video data. In this way, the video scene contained in the video file stored in the storage unit and the video file within the server network-connected can be effectively read or the target scene can be effectively retrieved. On the other hand, the playback unit of a plurality of videos divides a plurality of videos read from the storage unit into the main videos and the proxy videos so that these videos can be simultaneously displayed. In this way, a plurality of videos can be played back even in a limited transmission bandwidth and decoding capacity.

Video playback unit, video delivery unit and recording medium

Conversion encoding coefficients which are accumulated in an input memory and read out from the memory is input into converting unit. Conversion matrix integration unit multiplies a basis matrix of conversion encoding coefficient by, arbitrary interpolation matrix or thinning matrix which is input from resolution conversion matrix inputting unit and sampling conversion matrix inputting unit to produce a converting matrix, and outputs the same to the converting unit. Alternatively, the conversion matrix integration unit selects a converting matrix which is previously calculated and stored in the memory, and outputs the same to the converting unit. The converting unit inputs the converting matrix from the conversion matrix integration unit and the conversion encoding coefficients from the input memory, and achieves the resolution conversion and sampling conversion by matrix product computation of the conversion encoding coefficients in row unit.

Apparatus for converting conversion encoding coefficients using sampling/resolution conversion

It is made possible to concretely estimate actual transmission bit rate in a frame of grasping a line state by using a report packet. Together with media packets encoded by a video encoderand an audio encoder, a sender report packet generated by a sender report generation sectionis sent to the transmission line. A receiver report packet is fed back from the receiver side. Each of the sender report packet and the receiver report packet includes report packets of two kinds differing in size. A rate estimation sectionestimates transmission bit rate on the basis of round-trip delay time for the sender report packet and the receiver report packet each having a small size and round-trip delay time for the sender report packet and the receiver report packet each having a large size.

Moving picture compression encoding transceiver apparatus

In an information distribution/reproduction control apparatus, a plurality of stream servers distribute real-time reproducible stream information to a plurality of clients through a network like the Internet. A transit control server controls the stream servers for the distribution of the stream information, and also controls the clients for real-time reproduction of the stream information.

Information distribution/reproduction control apparatus, information distribution/reproduction control method, and computer-readable recording medium recorded with information distribution/reproduction control program

This invention provides a video information transmission apparatus for efficiently transmitting a digital video such as MPEG video at real time while controlling congestion on a QoS non-guaranteed IP network and suppressing degradation of a video quality. A transmission control sectionon a sender side outputs bit rate feedback information in accordance with congestion information on the network to a real-time encoder, and controls a transmission bit rate to change the transmission bit rate in accordance with congestion information on the network. The bit rate feedback information is obtained based on the congestion information on the network on the sender side, or obtained on a receiver side and fed back.

Video information transmission system, and apparatus and program used for video information transmission system

A volume data encoder with high encoding efficiency is provided. The object of the coding is volume data which contains a plurality of tomogram planes output from a CT and an MRI. A header analysis unit separates each plane image into header information and pixel information. A header compression unit compresses the separated header information. On the other hand, a two-dimensional transform unit conducts frequency decomposition on the pixel information. A skip portion detection and table generation unit detects skip portions that are the same in all coefficients in a z-direction, and stores them in a table. A one-dimensional transform unit conducts one-dimensional transform on the pixel information for coefficients except the skip portions. A unit block division unit divides each subband into unit blocks. An entropy encoding unit determines a parameter for entropy encoding according to statistical properties of all coefficients in all unit blocks included in each class.

Growing community of inventors

Saitama, Japan

Yasuyuki Nakajima