Patent application number | Description | Published |
20080199090 | CODING METHOD CONVERSION APPARATUS - A coding method conversion apparatus converts the first coded data coded by the first coding method into the second coded data. The coding method conversion apparatus includes: an H.264 decoder which decodes the first coded data; a deblocking filter strength calculation unit which calculates a filter strength of deblocking filtering of a second coding method, using at least one piece of decoding information except a coding type of the first coded data, the decoding information being obtained by decoding the first coded data; and a deblocking filter which performs the deblocking filtering to reduce noise in a boundary of blocks according to the filter strength calculated by the deblocking filter strength calculation unit. | 08-21-2008 |
20080225181 | Mobile Digital Broadcast Receiving Apparatus and Receiving Method - The present invention separates a video stream from compressed multiplexed data using a transport decoding section ( | 09-18-2008 |
20080317139 | MOVING PICTURE CODING APPARATUS - A moving picture coding apparatus is provided, which controls coding of a following stream, according to virtual buffer occupancy determined by a generated amount of coded data and an amount of coded data which is transferred to an output destination, when generating the following stream so that a preceding stream and the following stream, in each of which an image stream and other information are multiplexed, are reproduced seamlessly. The moving picture coding apparatus determines an initial value of the virtual buffer occupancy for the following stream, using an amount of delay resulting from multiplexing, in addition to virtual buffer occupancy at an end of the preceding stream. | 12-25-2008 |
20080317377 | IMAGE CODING APPARATUS AND IMAGE CODING METHOD - The image coding apparatus according to the present invention is an image coding apparatus, including an imaging unit, a chroma quantization width adjustment unit configured to determine a chroma quantization width using a first method when the amount of the incident light on the imaging unit is larger than the predetermined amount, and to adjust the chroma quantization width such that the chroma quantization width is larger than a quantization width determined using the first method when the light amount judging unit judges that the amount of the incident light is smaller than the predetermined amount, and a luma quantization width adjustment unit configured to determine a luma quantization width using a second method without being dependent on the amount of the incident light. | 12-25-2008 |
20090010322 | PICTURE CODING APPARATUS - The picture coding apparatus, which optimizes data amount of coded picture data without entailing an increase in circuit size and/or power consumption, includes: a picture input unit which obtains a moving picture signal Vin; a buffer; a lead detecting unit which detects a lead portion from the moving picture represented by the moving picture signal Vin; a coding unit which codes the moving picture signal Vin in the lead portion detected by the lead detecting unit, according to a coding condition for temporary coding; and a coding condition generating unit which generates a coding condition for actual coding, based on the result of the coding by the coding unit and the coding condition for temporary coding. Then, coding unit codes the moving picture signal Vin representing the moving picture including the aforementioned lead portion, according to the coding condition for actual coding. | 01-08-2009 |
20090245350 | IMAGE CODING APPARATUS AND IMAGE CODING METHOD - To provide an image coding apparatus and an image coding method for reliably suppressing delays in image coding processing while suppressing increases in circuit size. An image coding apparatus ( | 10-01-2009 |
20100202513 | VIDEO SIGNAL CODING APPARATUS AND VIDEO SIGNAL CODING METHOD - Video signal coding apparatus includes: a quantization unit which quantizes, using coefficient values in a first quantization matrix, a luminance signal of each of a first picture and a second picture coded after the first picture, and quantizes, using coefficient values in a second quantization matrix, a chrominance signal of each of the first picture and the second picture; a code amount obtainment unit which obtains a luminance code amount and a chrominance code amount of each of the first picture and the second picture; a rate calculation unit which calculates a rate of the chrominance code amount with respect to the luminance code amount for each of the first picture and the second picture, obtained by the code amount obtainment unit; and a rate control unit which changes a coefficient value of at least one of the first matrix and the second matrix used in quantizing the second picture, before the quantization unit quantizes the second picture, so that the rate for the second picture becomes smaller than the rate for the first picture. | 08-12-2010 |
20100208794 | IMAGE CODING APPARATUS AND IMAGE CODING METHOD - To provide an image coding apparatus capable of completing a coding process within a predetermined period. An image coding apparatus, which codes an input image on a block basis using pipeline processing, includes: a coding unit which generates coded data on a block basis, by coding the input image; a switching unit which selects and outputs either the coded data or uncompressed image data corresponding to the coded data; a judging unit which judges, on a block basis, whether the code amount of the coded data is larger than a predetermined threshold; and a control unit which changes, to a predetermined specified coding type, the coding type of a first block and the coding type of a second block which is at least one of blocks currently being pipeline-processed, when the code amount of coded data generated by coding the first block is judged to be larger than the threshold. The switching unit outputs the uncompressed image data corresponding to the coded data when the coding type of the coded data is the specified coding type. | 08-19-2010 |
20100220782 | VIDEO CODING DEVICE AND VIDEO CODING METHOD - A video coding device ( | 09-02-2010 |
20100316120 | MOVING PICTURE CODING DEVICE AND BROADCAST WAVE RECORDING DEVICE - A device coding a moving picture in units of a group including pictures, including: a generation unit generating quantization matrices; a selection unit selecting a quantization matrix for a current picture; a unit storing the quantization matrices in a header part of the group, and coding the current picture; a unit including a virtual buffer, and performing buffer simulation based on an amount of bits to be outputted; and a unit determining whether bit amount reducing is required for the current picture, based on a result of the buffer simulation, wherein the generation unit generates a normal quantization matrix used in common for at least one of the pictures, and a quantization matrix for bit amount reducing used only when the bit amount reducing is required, and the selection unit selecting the quantization matrix for bit amount reducing used for the current picture, when the bit amount reducing is required. | 12-16-2010 |
20110292998 | IMAGE CODING APPARATUS AND IMAGE CODING METHOD - To provide an image coding apparatus and an image coding method that allow selecting, according to an image in a macroblock to be coded, a most appropriate intra prediction mode for controlling the amount of generated code. | 12-01-2011 |
20120002022 | IMAGE CODING APPARATUS, IMAGE CODING METHOD, PROGRAM, AND INTEGRATED CIRCUIT - An image coding apparatus records stereoscopic video partially as 2D video so as to enable display to be performed while seamlessly switching between 3D video and 2D video, and includes: a control unit that sets one of a 2D coding mode and a 3D coding mode which are modes of coding the stereoscopic video so that, when displayed in 3D, the stereoscopic video is displayed as 2D video and 3D video respectively; and a coding unit that, in the case where the control unit switches from the 3D coding mode to the 2D coding mode, codes the to stereoscopic video according to a 3D coding standard in the 3D coding mode, and codes the stereoscopic video according to the 3D coding standard using a coding condition in the 2D coding mode, the coding condition being a condition for causing the stereoscopic video to be viewed as the 2D video when displayed. | 01-05-2012 |
20120002723 | STEREO VIDEO CODING APPARATUS AND STEREO VIDEO CODING METHOD - A stereo video coding apparatus which codes, out of a first viewpoint video and second viewpoint video, at least a second image included in the second viewpoint video, and includes: a judgment unit and a selection unit which output one of a prediction image generated by applying motion compensation to the second viewpoint video and a prediction image generated by applying disparity compensation to the first viewpoint video, by selectively switching between the prediction images; a subtractor; an orthogonal transform unit; a quantization unit; and a control unit which determines a quantization step size to be used by the quantization unit. The control unit determines a quantization step size to be applied to the second image to be a value smaller than a quantization step size to be applied to a first image that is paired with the second image, when the judgment unit selects the prediction image generated by applying disparity compensation. | 01-05-2012 |
20130162770 | 3D ENCODING APPARATUS - A 3D encoding apparatus encodes an input image and generates and outputs a three dimensional stream including a basic stream and an extended stream including a plurality of image groups. A 3D encoding apparatus includes a setter that sets a specific delay value for each image group based on the a first delay value as a delay value of the basic stream and a second delay value as a delay value of the three dimensional stream. The setter sets the specific delay value to a value not more than smaller one of the first delay value and the second delay value. The first virtual buffer and the second virtual buffer perform the buffer simulation for n+1th image group based on information about the specific delay value of the nth image group set by the setter in the basic stream and three dimensional stream. | 06-27-2013 |
20130258053 | THREE-DIMENSIONAL VIDEO ENCODING APPARATUS, THREE-DIMENSIONAL VIDEO CAPTURING APPARATUS, AND THREE-DIMENSIONAL VIDEO ENCODING METHOD - A provided three-dimensional video encoding apparatus adaptively switches a method of setting a reference picture according to a parallax between right and left sides, thereby improving encoding efficiency. A parallax acquisition unit | 10-03-2013 |
20130301723 | VIDEO ENCODING APPARATUS AND VIDEO ENCODING METHOD - A video encoding apparatus includes: an obtaining unit which sequentially obtains pictures included in video signals; and an encoding unit which (i) encodes an anchor picture in a first video signal using only an intra prediction, and outputs the anchor picture in an I-picture format, (ii) encodes an anchor picture in a second video signal using only the intra prediction, and outputs the anchor picture in a P-picture format, and (iii) encodes pictures other than the anchor pictures and included in the first and second video signals using the intra prediction or an inter prediction in a temporal direction. | 11-14-2013 |
20140003515 | VIDEO IMAGE DECODING DEVICE AND VIDEO IMAGE DECODING METHOD | 01-02-2014 |
20140098891 | VIDEO ENCODING DEVICE AND VIDEO ENCODING METHOD - A video encoding device, in the case where a video of the progressive format is inputted, processes a frame as a picture, in the case where a video of the interlace format is inputted, processes a field as a picture. A video encoding device generates code string by generating display control information corresponding to a format of the video and describing the display control information in the code string. The display control information includes sequence unit display control information which is commonly used in a display process of all pictures that belong to a sequence to be decoded and picture unit display control information which is individually used in a display process of a picture to be decoded. A second code string generator stores each of the sequence unit display control information and the picture unit display control information in an extended information area generated in units of pictures. | 04-10-2014 |
20140098892 | VIDEO DECODING DEVICE AND VIDEO DECODING METHOD - A video decoding device, in the case where a video of the progressive format is inputted, processes a frame as a picture, in the case where a video of the interlace format is inputted, processes a field as a picture. A video decoding device performs display control corresponding to a format of the both video by analyzing display control information in display control information analyzer. The display control information includes sequence unit display control information which is commonly used in a display process of all pictures that belong to a sequence to be decoded and picture unit display control information which is individually used in a display process of a picture to be decoded. A second code string analyzer acquires each of the sequence unit display control information and the picture unit display control information from an extended information area in units of pictures. | 04-10-2014 |