A method and apparatus for pre-processing an image sequence to extract side information (150) concerning the image sequence (145) is disclosed. In one embodiment, the side information is inserted into the image sequence (165), such that upon being encoded at a later time, the encoder (180) can utilize the side information to best select (182) one or more coding parameters. Alternatively, the side information can be storage device and is then made available to an encoder that is tasked with encoding the image sequence.

Apparatus and method for using side information to improve a coding system

Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. An example method includes receiving a media content signal, sampling the media content signal to generate samples, storing the samples in a buffer, determining a first sequence of samples in the buffer, determining a second sequence of samples in the buffer, wherein the second sequence of samples is of substantially equal length as the first sequence of samples, calculating an average of the first sequence of samples and the second sequence of samples to generate an average sequence of samples, extracting an identifier from the average sequence of samples, and storing the identifier in a tangible memory.

Methods and apparatus to perform audio watermarking and watermark detection and extraction

Methods and apparatuses for encoding and decoding based on intra prediction. The method of encoding an image based on intra prediction comprises dividing a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block, and performing intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub blocks.

Method and apparatus for encoding and decoding based on intra prediction

In the present invention, an inter-prediction mode based image processing method and an apparatus therefor are disclosed. Specifically, the inter-prediction based image processing method may comprise the steps of: deriving movement information of a control point for specifying a reference block of a current block; dividing the current block into sub-blocks; deriving movement information of the sub-blocks using the movement information of the control point; and generating a prediction block for each sub-block using the movement information of the sub-blocks.

Inter-prediction mode based image processing method, and apparatus therefor

An apparatus and method for improving the VT filter performance for moving pictures by deinterlacing. A VT filter unit receives data of a deinterlacing target field (field #n) and data of forward and backward fields of the target field (fields #n−1 and #n+1). A difference operation unit receives data of two frames including the field #n, and calculates the sum of the absolute values of differences between these frames. A filter coefficient setting unit decides a filter coefficient based on the sum of the absolute values of the differences. The VT filter unit subjects the inputted pixels to the filtering by using the filter coefficient to generate an interpolation pixel, and outputs the generated interpolation pixel. A double-speed converter composes the interlaced image and the interpolation pixel to convert the frame rate to be doubled, and outputs the converted image as a progressive image.

Method and apparatus for deinterlacing

PROBLEM TO BE SOLVED: To reduce degradation of restored image due to a transmission error by inserting a synchronizing word into an encoded data stream according to a data length interval determined by a synchronizing word inserting interval selector part SOLUTION: When starting the transmission of encoded data at an encoding device, a synchronizing word inserting interval selector part 11 determines a rough data length N for one macro block line from the format and frame rate of input image signal and the transmission speed of communication line and reports it to a synchronizing word inserting part 12 The synchronizing word inserting part 12, to which the data length N is reported, inserts the synchronizing word at the leading position of closest macro block before and after a position passed from the head of each synchronizing word just for the data length N This position to insert the synchronizing word is determined at the top of macro block for first appear after the passage of data length N or the top of macro block to finally appear within the range of data length N from each synchronizing word

Encoder and decoder

PROBLEM TO BE SOLVED: To conduct moving compensation inter-frame prediction by obtaining a motion vector between image frames with high accuracy, conducting optimum area division to an object shape or the like and applying efficient coding/decoding to the motion vector. SOLUTION: A moving compensation inter-frame prediction section 17 changes a coding processing area based on an input image and a reference image in a frame memory section 16 to generate a predicted image and to obtain coding side information. The prediction section 17 selects a valid/invalid mask for processing from a position of a processing object at the retrieval by a vector retrieval section 32 by using a valid area selection section 31, divides the processing area suitable for the image from a motion vector and the reference image and uses affine transformation and parallel displacement to generate a predicted image by using a variable area size prediction frame generating section 33, controls the area division and allows an area division pattern decision section 34 to provide an output of side information such as the predicted image, the motion vector and area division information. A side information coding section 35 codes an additional motion vector as a difference from a mean of basic motion vectors or applies prediction coding to the motion vector from a median of three adjacent motion vectors.

Moving image coding/decoding device using moving compensation inter-frame prediction system employing affine transformation

If received coded video-data includes data with an error unable to be decoded or data disagreeing with ITU-T recommendation H.261 (e.g., the number of bits per frame exceeds the limit defined by the recommendation), it must be stored with due countermeasures taken against error and inadaptable data, which allows the stored data to be effectively reproduced. Received coded video-data is decoded by a transmission-line decoding portion and divided into frames by a data dividing portion. Thereafter it is decoded by an information-source decoding portion and then intraframely encoded by a intraframe coding portion. According to a signal from a bit-counting portion showing that the number of bits in one frame of coded video-data exceeds the limit defined by ITU-T recommendation H.261 or anomalous signal of a frame image decoded by the information source decoding portion, a frame-processing control portion decides how to store each frame and controls a storable data transfer portion to select intraframe-coded data and transfer the selected data to a data storage.

Video data storing device and method for coding video data based upon determining whether or not video data conforms to a predetermined standard

PROBLEM TO BE SOLVED: To provide a moving image encoder and a moving image decoder capable of reducing the side information quantity of a motion vector, etc. SOLUTION: The encoder/decoder is provided with a motion vector searching part 31 for searching the motion vector of an image frame, a prediction part 32 for dividing the picture frame into one or more areas and generating a plurality of predictive images in each area by using the motion vector and a plurality of predictive systems, an area prediction deciding part 33 for deciding a prediction system the encoding efficiency of which is optimal among the plurality of predictive images and outputting the side information showing the predictive system and the motion vector and the predictive image, and a side information encoding part 34 for encoding the side information. When a prediction system different from the encoding object area is decided in the area adjacent to an encoding object area, the part 34 reduces a side information quantity required for the motion vector in the encoding object area by using a motion vector in the adjacent area.

Moving image encoder and decoder

A communication (transmission) procedure control system according to the present invention, which is used for multiplex transmission of a plurality of media such as video and synchronous data over a transmission line between sending and receiving terminals and which, in the case either video FEC frame synchronization or data synchronization is lost and can not be restored whereas the ITU-T Recommendation H.221 frame alignment is maintained, can restore from the mismatched mode condition without interrupting the synchronous transmission of the information. The system comprises a video synchronization monitoring portion (11) for FEC video synchronization, a data synchronization monitoring portion (12) for synchronous data and H.221 synchronization monitoring portion (13) for frame synchronization of H.221 frames, a synchronization control portion (14) that is connected to the above-mentioned monitoring portions (11, 12, 13) to realize overall control of the synchronized conditions of every kind of information and makes an request for executing a mode-mismatch recovery procedure in the case that synchronization of any information was lost and could not be restored after the elapse of a specified time, and a transmission procedure executing portion (15) which is connected to the synchronization control portion (14) and executes the synchronization restoring procedure and the mode-mismatch recovery procedure.

Hibi Keiichi

Papers

Encoder and decoder

Moving image coding/decoding device using moving compensation inter-frame prediction system employing affine transformation

Video data storing device and method for coding video data based upon determining whether or not video data conforms to a predetermined standard

Moving image encoder and decoder

Communication procedure control system