Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Yoshiko Hatano

Yoshinori Asamura

Hidetoshi Mishima

Tadashi Kasezawa

Takahiro Nakai

Shuji Sotoda

Hiroaki Sugiura

Ken Onishi

Masato Nagasawa

Yoshinobu Ishida

Shuichi Kagawa

Kazuhiro Sugiyama

Masako Asamura

Hiroyuki Oohata

Satoshi Kurahashi

Junko Kijima

Mamoru Inamura

Takashi Nakao

Junko Shinohara

Naoyuki Fujiyama

Tomonori Fukuta

Tetsuya Kuno

Takashi Shinohara

Takashi Okamoto

Kazuya Maeshima

Keiji Hatanaka

Koji Okazaki

Tomoaki Ikeda

Hiromu Hasegawa

Takashi Itou

Yoshiki Ono

Toshiyuki Shimizu

Manabu Tsukamoto

Tadashi Minobe

Junji Sukeno

Seiji Okumura

Takuji Kurashita

Takashi Shiroshita

Kazuhioro Sugiyama

Provision is made for obtaining a high-quality image with noise, such as ringing, reduced. An image processing device includes an image correction means for applying image-shake correction processing to an input image; a correction-image characteristic detection means for detecting a characteristic of a correction image obtained through the image-shake correction processing; a first characteristic-determination means for outputting selection information, based on a characteristic-detected correction image obtained through detection of the characteristic of the correction image; and an image outputting means for outputting the input image or the correction image, based on the selection information. As a result, it is made possible to obtain a high-quality image with noise reduced.

Image processing device, image processing method, and information terminal apparatus

Included are: a prefilter () for outputting, based on filter characteristics control data, predetermined frequency components in an input video signal as current image data; encoding means () for subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to current image data as a result of the encoding process; and filter control means () for outputting the filter characteristics control data that is set based only on one or two of the encoding parameters.

Video signal encoding device and video signal encoding method

An image correction method can perform adaptive correction processing to a taken image by a simple construction in a short time, and includes the steps of: computing window region local difference values for a plurality of neighboring pixels, each of the window region local difference values being a difference value between image data of a notice pixel () in a difference value determination region () formed of a whole or a part of a screen area of an input image () and image data of a neighboring pixel in a window region () set around the notice pixel (), thereby determining a maximum local difference value which is a maximum value of the window region local difference values in each window region; determining a threshold value reflecting a characteristic of the input image on the basis of the maximum local difference value; producing adaptive filter coefficients for respective pixels of the input image by using the threshold value; and performing filter processing of the input image by using the adaptive filter coefficients.

Image correction device and image correction method

An encoding controller () generates and outputs a current skip signal (SK) to a switch circuit (), and outputs a quantization parameter (Qp) for controlling a code amount after the encoding processing of a current VOP by an encoder () using a current scene change signal (SC), to an encoder (). The current scene change signal (SC) is set on the basis of the current VOP, a previous scene change signal (SC), and a previous skip signal (SK).

Image encoding device and image encoding method

An encoding system capable of preventing the overflow of a buffer and performing the encoding of a VOP within a predetermined time period even where the processing time period necessary for encoding each macroblock is not constant. In order to provide the encoding system, the maximum number of bits Tmax is set for each VOP, and the output of encoding unit and the output of fixed code output unit is switched and outputted so that the number of bits Sc of the VOP may not exceed the Tmax.

Encoding system and encoding method

A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.

Digital video signal record and playback device and method for selectively reproducing desired video information from an optical disk

A color conversion device and method are provided in which six hues and inter-hue areas are corrected independently, and the conversion characteristics can be changed flexibly, and which does not require a large-capacity memory. Coefficients of second-order and first-order calculation terms relating to the respective hues, first-order calculation term using comparison-result data relating to the respective inter-hue areas, and product terms based on the comparison-result data and the hue data are changed so as to change the target hue or inter-hue area, without influencing other hues or inter-hue areas.

Color conversion device and method

To provide a coding device which does not generate a video packet having only a stuffing but can insert a minimum stuffing to prevent an underflow of a buffer in the case in which a video packet has a length limit. A minimum code volume (Tmin) is set for each VOP and a break of a video packet and an insertion of a stuffing are determined such that a code volume (Sc) of the VOP is not smaller than the minimum code volume (Tmin).

Coding device and coding method

An image encoding device is provided that can transmit encoded image data without lowering the frame rate even when the transmission speed of the transmission path is lowered. An encoded region designator selects the region that is to be encoded, in the input image, depending on the bit rate of the transmission path. Only such a region that is designated by the encoded region designator is encoded. The encoded region designator may be one which selects the region that is to be encoded, according to the bit rate of the transmission path, and the motion vector detected by the image encoding circuit. As an alternative, an encoded region designator may be used which selects the region that is to be encoded according to the bit rate of the transmission path, and the information on the designated region supplied from the outside. Also, a selector limiting the number of bits of the signal from the image signal input circuit may be provided, and when the bit rate of the transmission path is lowered, the number of bits of the input image may be adaptively switched.

Image compression of selected regions based on transmission bit rate, motion, and/or region information, and bit selection before compression based on transmission bit rate

By changing coefficients of second-order and first-order calculation terms relating to respective hues, and first-order calculation terms in the form of comparison-result data relating to respective inter-hue areas, only the target hue or inter-hue area among the six hues of red, blue, green, yellow, cyan, and magenta, and the six inter-hue areas can be varied, without affecting other hues and inter-hue areas. Thus, the six hues and six inter-hue areas can be corrected independently, and the large-capacity memory is not required.

Color conversion device and color conversion method

As the video signals of macroblocks are coded, they are stored in a buffer. When the total code length of the stored macroblocks exceeds a predetermined value, all but the most recently coded macroblock are output from the buffer as a video packet, and the most recently coded macroblock is coded again. To minimize this occurrence, when each coded macroblock is stored, the code length of the next macroblock is predicted and added to the total length, and if the resulting sum exceeds the predetermined value, all of the coded macroblocks stored in the buffer are output as a video packet.

Video coding method and apparatus that predicts macroblock code length

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Tokyo, Japan

Yoshiko Hatano