Abstract: A call establishing control unit 6 of a communication terminal A sends a call through a transmission interface unit 5a in a bearer appropriate to multimedia communication, establishes a communication channel, sends a call through a transmission interface unit 5b in a bearer appropriate to a group of additional information and control information and establishes another communication channel. A video codec 1 and an audio codec 2 perform the multimedia communication through a multiplexing and demultiplexing unit 4 and the transmission interface unit 5a. An additional information and control information processing unit 3 performs communication of additional information and control information through the transmission interface unit 5b.

Abstract: A service receiving unit 1 receiving a request of a multi-point communication service from a communication terminal 3A sends call-in addresses of all communication terminals 3A, 3B and 3C and a command instructing the provision of the multi-point communication service to a communication service unit 2. The communication service unit 2 sends a call to each communication terminal according to the call-in address and the command and provides the multi-point communication service. An accounting information server 4 performs the accounting to demand a communication charge and a service providing charge on the communication terminal 3A, the communication terminals 3A, 3B and 3C or a third person according to information of both a communication time-period and the number of communication terminals sent from the service receiving unit 1. Each charge is fixed or changed in proportion to or in inversely proportion to the number of communication terminals.

Abstract: The multiplexer device comprises a multiplexing means for multiplexing a plurality types of media information and outputting a multiplexed bit stream, a priority deciding means for deciding priority corresponding to each of the media information, and a multiplexing controller for controlling multiplexing of each of the media information according to the multiplexing means based on the priority decided by the priority deciding means. In addition the priority in each information is multiplexed.

Abstract: The multiplexer device comprises a multiplexing means for multiplexing a plurality types of media information and outputting a multiplexed bit stream, a priority deciding means for deciding priority corresponding to each of the media information, and a multiplexing controller for controlling multiplexing of each of the media information according to the multiplexing means based on the priority decided by the priority deciding means. In addition the priority in each information is multiplexed.

Abstract: An image signal processor is provided which accurately detects duplicate fields of a telecinema signal. The image signal processor includes a duplicate field detecting means for detecting duplicate fields of the telecinema signal and a duplicate field removing means for removing the duplicate fields. The duplicate field detecting means uses a threshold value for detecting a duplicate field and a threshold value for detecting a non-duplicate field to improve the accuracy of detection.

Abstract: A picture analyzer detects coding difficulty information by analyzing the source picture data. A picture converter converts the format of the source picture data using spatial conversion or temporal conversion, or both. A coding unit then codes the converted picture data output from the picture converter. A preprocess controller controls the picture converter based on the coding difficulty information, selecting either spatial conversion or temporal conversion, or both. The resulting encoded picture features visually outstanding image quality in which block distortion is not conspicuous, and the coding unit avoids using a coarser than necessary quantization step even when the bit rate is low.

Abstract: It is an object of the invention to obtain a video encoder and a video decoder performing a highly accurate prediction of a picture, transformed by other than translation, within a short processing time in a small-scaled circuit. A video encoder for performing compression encoding of an input picture includes motion compensated prediction means for performing interframe motion detection. The motion compensated prediction means has a motion detector including a transformed block matching unit for transforming a reference picture portion into a picture portion having a predefined shape for performing motion detection and a motion compensator including a corresponding pel determinator for determining integer pels of real sample points of the transformed reference picture portion corresponding to an integer pel of the input picture block according to the motion parameters supplied from the motion detector as a result of the comparison so as to supply prediction picture data.

Abstract: An image coded data re-encoding apparatus (30) which generates in an image coded data analyzer (310) coded data after signal processing (221) by performing a first digital signal processing on first image coded data (220), supplies an image coded data synthesizer (320) with the coded data after signal processing (221) and multiple signals (222) associated with the first image coded data, and generates in the image coded data synthesizer (320) a second image coded data (240) by performing on the coded data after signal processing (221) a second digital signal processing based on multiple signals (222). The second image coded data is generated without once decoding the first image coded data. This makes it possible to prevent degradation in image quality, delay involved in the transform and an increase of the device size.

Abstract: To achieve an encoding system including a highly efficient prediction performed in response to the content of a scene, a significance, and a motion characteristic of a moving picture and the like, memories a, b, c, motion compensator 5 responsive to an arbitrary transform parameter representing the motion of a prediction picture segment for generating a predicted picture by using arbitrary data stored in the memories a, b, c based upon the transform parameter, and memory update unit 15 for allowing the content of one or more of the memories to be updated at an arbitrary period of time, are provided.

Abstract: User information from a terminal is input to a user information inputting section 8, retrieval keys are input to a retrieval key inputting section 7 and retrieval demanding signal is input to a user demand inputting section 6. A content retrieving section 10 searches a database B based upon the retrieval keys and outputs a retrieval result list to a retrieval result list editing section 11. A terminal ability information acquiring section 9 acquires information about processing ability of the terminal from the user information input to the user information inputting section 8 and the retrieval result list editing section 11 edits the retrieval result list from the content retrieving section 10 based upon its processing ability information, and on the other hand, an output content editing section 13 edits the contents based upon the terminal ability information, and then both sections delivers through their delivering sections 12, 14 to the terminal, respectively.

Abstract: An efficient video encoder and a compression encoding of an input picture includes motion compensated prediction means for performing interframe motion detection. The motion compensated prediction means has a motion detector and a motion compensator. The motion detector includes an image transforming unit that transforms a reference picture portion into a picture portion having a predefined shape. The motion compensator includes a pel determinator for determining integer pels of real sample points of the transformed reference picture portion that corresponds to an integer pel of the input picture block according to the motion parameters supplied from the motion detector as a result of the comparison so as to supply prediction picture data. The video encoder and a decoder having a motion compensator that performs operations similar to the video encoder are combined to form a video encoding and decoding system.

Abstract: A data switching apparatus selects and transmits one of a plurality of received data and switches coded data while holding a coding unit of the coded data. A data switching apparatus includes plural data unit detectors each for detecting a coding unit of a data from a received data; plural data storages each for storing a received data in a buffer and transmitting the received data at a given time from a point specified by the data unit detector; and a data selecting unit for selecting and transmitting only one data stream from a plurality of data streams which are transmitted respectively from the plural data storages.

Abstract: An image coding apparatus which includes a frame memory selecting unit (35) for selecting, in response to a selection signal, an image to be continuously stored in a plurality of frame memories (9, 10) as a background image and storing the background image into the plurality of frame memories (9, 10), and a background motion compensating unit (14, 39) for performing motion compensating prediction corresponding to an input image based on the background image to generate a predicted image based on the motion compensating prediction, and an image decoding apparatus corresponding to the image coding apparatus.

Abstract: The present invention provides a digital video receiving apparatus for displaying a plurality of digital TV pictures on a plurality of receiving terminal apparatuses. The digital video receiving apparatus includes a tuner for extracting the received digital TV multiplexed signal, a demodulator for decoding the digital signals provided from the tuner, a demultiplexer for demultiplexing the multiplexed signals outputted from the demodulator to obtain a bit stream including a video signal, an audio signal and a data signal. The digital video receiving apparatus further includes a video decoder, an audio decoder and a data decoder for decoding signals outputted from the demultiplexer. The digital video receiving apparatus decodes the input multiplexed digital TV signal and outputs a video signal, an audio signal and a data signal corresponding to respective programs.

Abstract: The input image controller reduces the frame rate of a motion image signal as a preprocessing, provides process information indicating the skipped frames and/or skipped fields to the image coder, wherein the image coder codes, by use of the MPEG 2 method, the motion image signal whose frame rate has been reduced, and outputs the data which is in conformity with the MPEG 2 method and includes overhead information on the basis of the process information.

Abstract: A plurality of picture frames is arranged as one group according to correlation between picture frames in a picture sequence. Then, a coding mode corresponding to each of the picture frames of the group is determined. Subsequently, preceding is performed according to the coding mode. Then, the coding of a picture is performed by controlling a coding parameter according to a result of the preceding and to the coding mode.

Abstract: The present invention provides a digital video receiving apparatus for displaying a plurality of digital TV pictures on a plurality of receiving terminal apparatuses. The digital video receiving apparatus includes a tuner for extracting the received digital TV multiplexed signal, a demodulator for decoding the digital signals provided from the tuner, a demultiplexer for demultiplexing the multiplexed signals outputted from the demodulator to obtain a bit stream including a video signal, an audio signal and a data signal. The digital video receiving apparatus further includes a video decoder, an audio decoder and a data decoder for decoding signals outputted from the demultiplexer. The digital video receiving apparatus decodes the input multiplexed digital TV signal and outputs a video signal, an audio signal and a data signal corresponding to respective programs.

Abstract: The multiplexer device comprises a multiplexing means for multiplexing a plurality types of media information and outputting a multiplexed bit stream, a priority deciding means for deciding priority corresponding to each of the media information, and a multiplexing controller for controlling multiplexing of each of the media information according to the multiplexing means based on the priority decided by the priority deciding means. In addition the priority in each information is multiplexed.

Abstract: An adaptive blocking coding system selects an effective blocking of an input image signal to be encoded in accordance with the correlation between fields, even if motion is detected between the fields. The blocking patterns include an individual field blocking, a non-interlace blocking, a split blocking and an inverted split blocking. Further, the coding system searches for motion from both odd and even fields of a frame for producing a motion compensated prediction signal in order to provide high-efficient coding.

Abstract: A motion compensation predicting coding apparatus includes a motion detector for comparing pixel data in an image signal with pixel data of the previous image signal to generate a motion vector. The motion vector is indicative of the displacement differences between the image signal and the previous image signal. The image signal may be organized into blocks of pixel data for a single field or for multiple fields when notion detection is performed on the image signal by the motion detector. A subtracter generates a prediction compensation error signal by subtracting the pixel data in the previous image signal from the pixel data of the image signal. A coder receives the prediction compensation error signal and generates an appropriate coded output. The apparatus may also include an adaptive blocking mechanism for receiving the prediction compensation error signal and organizing the data in the signal into blocks into one of several fashions as dictated by the motion vector.