Kabushiki Kaisha Toshiba

Yuji Kawashima

Yoshihiro Kikuchi

Tatsuro Fujisawa

Shingo Suzuki

Satoshi Hoshina

Noriaki Kitada

Kosuke Uchida

Atsushi Asano

Emi Maruyama

Jun Sato

Makoto Oshikiri

Michiyo Morimoto

According to one embodiment, an information processing apparatus which encodes a moving image signal, includes an inter-prediction mode determination unit which determines a combination of an inter-prediction mode used by an inter-prediction unit and a DCT used by a transformation unit among from an inter-prediction modes and a DCTs, for each of macroblocks. The inter-prediction mode determination unit includes a first selection unit which selects DCTs of a predetermined number from the DCTs, for at least one specific inter-prediction mode among the inter-prediction modes, and a second selection unit which selects a combination of one inter-prediction mode and one DCT from the inter-prediction modes and the DCTs of the predetermined number selected by the first selection unit.

Information processing apparatus and inter-prediction mode determination method

According to one embodiment, an information processing apparatus includes an inter-prediction unit which generates a prediction signal, a transformation unit which orthogonal transform a prediction residual signal between the prediction signal and a picture signal of the macro block, and an inter-prediction mode determining unit which determines a combination of an inter-prediction mode used by the inter-prediction unit and DCT used by the transformation unit for each macro block. The inter-prediction mode determining unit includes a first selection unit which selects a preset number of inter-prediction modes from plural types of inter-prediction mode with a specified type of DCT, and a second selection unit which selects a combination of one inter-prediction mode and one DCT from the preset number of inter-prediction modes selected by the first selection unit and the plural types of DCT.

Information processing apparatus and inter-prediction mode determining method

One embodiment provides a moving picture decoding device for decoding a compression-coded moving picture stream, including: an inter-view predicting module configured to perform inter-view prediction processing on processing subject blocks of each frame to be decoded; a load detector configured to detect a magnitude of an apparatus processing load including a processing load for decoding; a judging module configured to judge whether the magnitude of the apparatus processing load detected by the load detector is small; and a controller configured to control the inter-view predicting module so as to cause simplification of the inter-view prediction processing if the judging module judges that the magnitude of the apparatus processing load is not small.

Moving picture decoding device and moving picture decoding method

One embodiment provides a moving picture decoding device for decoding a compression-coded video stream, including: an inverse-quadrature-transformer/dequantizer configured to perform inverse-quadrature-transformation/dequantization processing on each frame to be decoded; a load detector configured to detect a magnitude of an apparatus processing load including a processing load for decoding; a judging module configured to judge whether the magnitude of the apparatus processing load detected by the load detecting module is small; and a controller configured to control the inverse-quadrature-transformer/dequantizer so as to skip at least part of the inverse-quadrature-transformation/dequantization processing if the judging module judges that the magnitude of the apparatus processing load is not small.

According to one embodiment, a video decoding apparatus decoding a video stream selectively generates one of an intra prediction image and an inter prediction image based on an encoding mode of a decoding object from the video stream and decoded images thereof, generates a residual decoded image based on a quantization parameter of a decoding object from the video stream, generates a decoded image by adding one of an intra prediction image and an inter prediction image selectively generated, and the residual decoded image, applies deblocking filter process for reducing a block distortion onto the decoded image, extracts information on an encoding mode from the video image stream to determine whether or not inter prediction processes for generating the inter prediction image should be simplified, and simplifies the inter prediction process step-by-step on the basis of the result of the determination.

Video decoding apparatus and video decoding method

According to one embodiment, information processing apparatus which decodes compressed and encoded video stream by software, selectively generates one of intra and inter prediction image on the basis of encoding mode of decoding object from video stream and decoded images thereof, generates a residual error decoded image on the basis of a quantization parameter of decoding object from video stream, generates decoded image by adding intra and inter prediction image selectively generated, and residual error decoded image, applies deblocking filter process for reducing block distortion onto decoded image, extracts at least one of information on a quantization parameter and information on encoding mode of decoding object from video stream, determines whether or not filter process is skipped on the basis of extracted information thereof, and selectively skips filter process on the basis of a result of determination, and selectively switches determination and processing of skip to be valid or invalid.

Information processing apparatus and video decoding method of information processing apparatus

According to one embodiment, an information processing apparatus which includes a video decoding processing to decode a compressed and encoded video image stream by software, selectively generates one of an intra prediction image and an inter prediction image on the basis of an encoding mode of a decoding object from the video stream and a decoded image thereof, generates a residual decoded image based on a quantization parameter of a decoding object from the video stream, generates a decoded image by adding the generated prediction image and the residual decoded image, applies a deblocking filter process, extracts information on an encoding mode from the video image stream to determine whether or not inter prediction processes for generating the inter prediction image should be simplified, simplifies the inter prediction process step-by-step on the basis of the result of the determination.

According to one embodiment, a moving image decoding apparatus is applied in a video reproducing apparatus and includes a deblocking filter unit for performing deblocking filtering and a processing load detection unit for detecting an intra-unit processing load including a processing load of a decoder. The moving image decoding apparatus sets a judgment threshold value for judging whether or not to perform the deblocking filtering depending on a load level indicating the level of the magnitude of the intra-unit processing load, judges whether or not a processing parameter obtained from adjacent blocks of a plurality of blocks constituting each frame is greater than the judgment threshold value, and conducts control not to perform the deblocking filtering when the processing parameter is smaller than the judgment threshold value.

Moving image decoding apparatus and moving image decoding method

According to one embodiment, a video decoding apparatus decoding a video stream selectively generates one of an intra prediction image and an inter prediction image based on an encoding mode of a decoding object from the video stream and decoded images thereof, generates a residual decoded image based on a quantization parameter of a decoding object from the video stream, generates a decoded image by adding an intra prediction image and an inter prediction image selectively generated, and the residual decoded image, applies deblocking filter process for reducing a block distortion onto the decoded image, extracting at least one of information on a quantization parameter and information on an encoding mode of a decoding object from the video stream, and determining whether or not the filter process is skipped based on extracted information thereof, and selectively skipping the filter process based on a result of the determination.

A communication terminal performs a discrete cosine transform and a quantization process in accordance with a selected coding mode so as to reduce loads caused by these processings and suppress degradation of picture quality. When performing coding of a moving picture inputted through a picture input part, a control part determines which coding mode among 4&#xd7;4 intra prediction coding on a luminance signal, 16&#xd7;16 intra prediction coding, intra prediction coding on a color-differential signal, and inter prediction coding is performed. In accordance with the selected coding mode, and in view of a predictive error, the processing content in the discrete cosine transform and the quantization process is switched.

Communication terminal

One embodiment of the invention provides a video coding apparatus including an intraprediction section that generates prediction signals by plural intraprediction modes, an interprediction section that generates prediction signals by plural interprediction modes, and a first determination section that selects a first prediction mode to select a prediction signal by the first prediction mode from among the prediction signals by the plural intraprediction modes and the plural interprediction modes. The first determination section includes a second determination section that selects a second prediction mode from among the plural interprediction modes, a candidate limiting section that selects at least one of the plural intraprediction modes based on the second prediction mode, a third determination section that selects a third prediction mode from among the at least one of the plural intraprediction modes and a fourth determination section that selects the first prediction mode from among the second and third prediction modes.

Video coding apparatus

An information processing apparatus is presented that includes a first determination unit which determines whether a processing target frame is a frame of a predetermined type and a second determination unit which determines whether an interval between the frame and a frame of the predetermined type located temporally nearest in the forward direction, exceeds a predetermined frame count. In addition, a conversion unit is included which converts the processing target frame into a frame of the predetermined type, when the second determination unit determines that the interval exceeds the predetermined frame count.

Information processing apparatus, conversion circuit, and program

In a moving picture encoding apparatus, a processing load detection section detects a load and outputs load information and a video encoder judges a load level based on the load information. A start pixel in target pixels is determined depending on the load level, the evaluation value is calculated from pixels specified by the start pixel, a encoding cost is calculated based on the evaluation value to select one of prediction modes for minimizing the encoding cost. The start pixel is so selected as to exclude the pixels which are spatially neighboring to reference pixels for prediction, instead of all pixels within a 4&#xd7;4 pixel block as the processing load becomes large. Thus, the picture processing amount is reducing while suppressing the deterioration of the encoding performance.

Moving picture encoding apparatus

According to one embodiment, an information processing apparatus includes an input unit which inputs moving picture signal, a processing load detecting unit which detects a processing load, a motion estimation unit which detects the inter-frame motion of blocks obtained by dividing an input picture constituting the input moving picture signal in a square region which is set according to the processing load detected at the processing load detecting unit and whose diagonal line is parallel to one side of the blocks, a motion compensation prediction unit which generates a prediction signal based on the result of the detection at the motion estimation unit, a conversion unit which converts a prediction residual error signal obtained from a residual error in the prediction signal and the input picture signal, and an output unit which encodes a conversion coefficient converted at the conversion unit, and outputs an encoded stream.

Information processing apparatus with video encoding process control based on detected load

A video decoder including: an input module configured to receive a video stream that is coded based on macroblocks; a frame determination module configured to determine whether or not a decoding subject image in the video stream that is input to the input module is a non-reference frame image that is not referred to when decoding another image; a slice analyzing module configured to determine, for each slice being configured by arranging the macroblocks, whether or not skip macroblocks each of which has no coding information of its own exist in a predetermined number or more when the frame determination module determines that the decoding subject image is a non-reference frame image; and a slice editing module configured to set, as skip macroblocks, all macroblocks in a slice for which the slice analyzing module determines that skip macroblocks exist in the predetermined number or more.

Growing community of inventors

Ome, Japan

Yuji Kawashima