Abstract: A transcoder reducing processing amount when a coded stream to which at least intra prediction is applied is transcoded into a coded stream to which intra prediction and inter prediction are applied. The transcoder (100) converts a first coded stream to at least part of which intra prediction is applied, into a second coded stream to which intra prediction and inter prediction are applied. The transcoder (100) includes: a decoding unit (200) that decodes the first coded stream to generate decoded image data; a prediction mode obtaining unit (101) that obtains a prediction mode of intra prediction applied in decoding; a coding unit (300) that codes the decoded image data by applying the intra prediction or inter prediction to generate the second coded stream; and a control unit (103) that controls a coding unit (300) so that the coding unit (300) uses the prediction mode obtained by the prediction mode obtaining unit (101) when the coding unit (300) applies intra prediction.

Abstract: The resolution, frame rate, or both can be improved when imaging moving subjects in an imaging apparatus using a CMOS image sensor. The imaging apparatus has an image sensor having a two-dimensional array of pixels. Each of the pixels includes an element operable to produce an electric charge by photoelectrically converting light from an imaged subject and a part operable to accumulate the produced charge and output an accumulated charge or a signal representing the accumulated charge. The imaging apparatus also has an area control unit operable to define a specified area of the image sensor containing a plurality of pixels and an area density control unit operable to specify a density of pixels read from the specified area defined by the area control unit.

Abstract: The present invention provides a video encoding device in which a capacity of a binary data storing unit is small, a size of the video encoding device is small, a video signal can be processed in real time, and reduction in quality of images generated from the eventually obtained data can be prevented. The video encoding device according to the present invention includes: a video encoding unit which encodes a video signal; a binarization unit which binarizes an encoded value obtained from the video encoding unit; and an entropy encoding unit which subjects entropy encoding to binary data obtained from the binarization unit.

Abstract: An image coding device in which entropy coding is applied to binarized data. An image coding unit codes image data; an entropy coding unit binarizes the coded image data and applies entropy coding to the binarized data; and a coding amount prediction unit obtains a predictive value corresponding to a coding amount of the image data on a predetermined data unit basis prior to the actual binarizing. A coding amount comparing unit compares the predictive value to a predetermined threshold value; a I_PCM decision unit outputs a selection signal indicating the image data on a predetermined data unit basis or I_PCM data, which is selected based on a result of the comparing; and an output selection unit and an output unit output the selected data indicated by the selection signal.

Abstract: An image recording device (100), which can suppress, without causing significant image degradation, image transfer speed from an imaging device, coding speed, and image recording speed that are necessary for high-speed image capturing, includes: an image signal processing unit (102) which sequentially reads, at a frame rate for high-speed image capturing, images generated through image capturing by an imaging unit (101), and outputs, from among the images sequentially read, images read at a frame rate for normal image capturing at high resolution and other images at low resolution; an image coding unit (103) which generates a high resolution coded stream by coding an image sequence made up of the high resolution images outputted by the image signal processing unit (102); a low-resolution image coding unit (104) which generates a low resolution coded stream by coding an image sequence made up of the other low resolution images outputted by the image signal processing unit (102); and a recording processing unit

Abstract: An image encoding apparatus (100) that encodes image data includes: an image encoding unit (110) that receives an input of the image data and image parameters and generates encoded image data by performing image encoding on the image data with reference to the image parameters and furthermore binarizing and arithmetically encoding the image data; a parameter processing unit (120) that outputs, as parameter information, parameters that are included in the image parameters and that are referred to when the encoded image data is arithmetically decoded, and encodes the image parameters to generate and output encoded image parameters; and a stream generation unit (130) that generates a stream including the encoded image data obtained from the image encoding unit (110) and the parameter information and the encoded image parameters that are outputted from the parameter processing unit (120).

Abstract: The coding apparatus according to the present invention is a coding apparatus which codes data regarding a moving picture, and includes: a DCT coefficient advanced-coding unit which performs advanced-coding on multivalued data representing a quantized DCT coefficient or a motion vector, so as to reduce the bit length of binary data obtained by binarizing the multivalued data; an advanced-coded coefficient/binary coefficient conversion unit which converts the advanced-coded data obtained by the DCT coefficient advanced-coding unit into the binary data; and an arithmetic coding unit which performs arithmetic coding on the binary data obtained by the advanced-coded coefficient/binary coefficient conversion unit.

Abstract: An image coder with a pre-record function includes a coding unit (11) which codes a motion-picture signal to generate closed GOPs or open GOPs, a buffer unit (14) in which at least one of the GOPs generated by the coding unit (11) is stored in a first-in first-out manner, a user I/F unit (12a) which receives instructions to start or stop capturing a moving picture, and a recording control unit (12b) which, before the user I/F unit (12a) receives an instruction to start capturing a moving picture, establishes a non-recording status and causes the coding unit (11) to start and continue coding the motion-picture signal so as to generate a GOP sequence including a closed GOP, and when the user I/F unit (12a) receives the instruction, switches from the non-recording status to a non-recording status and causes the coding unit (11) to generate a GOP sequence including only open GOPs.

Abstract: When a method or apparatus of assuring simultaneous exposure, such as a mechanical shutter, is not provided with a MOS imaging sensor, moving subjects are distorted with a MOS image sensor when capturing a still image of a fast-moving subject because imaging and reading are not simultaneous across the MOS sensor. Changing the MOS sensor exposure sequence and reading sequence, and interpolating the read data, change and correct the read sequence line by line when imaging a high resolution moving image, and thus improve distortion in moving subjects.

Abstract: To provide a code amount estimating device which can perform, at high speed and with high precision, estimation of code amount obtained after arithmetic coding. The code amount estimating device includes a context index calculation unit which calculates a context index of a binary symbol included in binary data, and an estimate code amount calculation unit which calculates an estimate code amount for the binary data based on symbol occurrence probability information stored in association with the calculated context index and on a held probability interval range. The estimate code amount calculation unit estimates the code amount for the binary data according to code amount information indicating an association between (i) a combination of a binary symbol string including one or more binary symbols, symbol occurrence probability information, and a probability interval range and (ii) an estimate code amount for the binary symbol string.

Abstract: An image decoding apparatus that performs decoding using motion compensation includes: a reference area specifying unit that specifies, prior to decoding performed on a block-by-block basis, a reference area that is an existing range of reference pixels in a reference picture based on a block on which motion compensation is to be performed; a decoded pixel memory which stores decoded pixel data; a reference pixel buffer that holds reference pixel data; a reference-pixel-reading control unit that copies pixel data of an area including the reference area specified by said reference area specifying unit, from said decoded pixel memory into said reference pixel buffer; a motion compensation unit that generates interpolation pixel data by performing the motion compensation using reference pixel data copied into said reference pixel buffer; and a pixel value decoding unit that generates decoded pixel data using the interpolation pixel data.

Abstract: To provide an image coding apparatus that can reduce arithmetic processing and scale down an LSI circuit. An image coding apparatus (100) includes an intermediate stream generating unit (130) generating an intermediate stream, by generating an intermediate code from image data, coding header information among coding conditions for image coding, and synthesizing the generated intermediate code and the coded header information, and a coded stream generating unit (134) outputting a coded stream, by performing variable length coding on the intermediate code included in the intermediate stream to generate coded image data, and synthesizing the generated coded image data and the header information.

Abstract: A tag storing unit stores, in a plurality of entries, a plurality of tags corresponding to a plurality of addresses, a parity bit of each of the tags, and a reverse bit obtained by reversing the parity bit. A data storing unit stores a plurality of data corresponding to the tags in a plurality of entries. A comparing unit compares an address for search with a tag of each of the entries. A determining unit performs an OR-operation on contents stored in a plurality of entries when a multiple hit occurs from a comparison by the comparing unit, and determines a cause of the multiple hit based on a parity bit and a reverse bit obtained after the OR-operation.

Abstract: When a method or apparatus of assuring simultaneous exposure, such as a mechanical shutter, is not provided with a MOS imaging sensor, moving subjects are distorted with a MOS image sensor when capturing a still image of a fast-moving subject because imaging and reading are not simultaneous across the MOS sensor. Changing the MOS sensor exposure sequence and reading sequence, and interpolating the read data, change and correct the read sequence line by line when imaging a high resolution moving image, and thus improve distortion in moving subjects.

Abstract: The decoding apparatus enabling high-speed arithmetic decoding in decoding data coded using CABAC is an arithmetic decoding apparatus which receives, as input, coded data obtained by converting multivalue information of syntax into binary data then performing Context-based Adaptive Binary Arithmetic Coding on the binary data, and which decodes the coded data into the original multivalue information.

Abstract: An image recording/reproducing device of this invention includes the following units. An image signal processing unit generates second captured image signals according to a second method. A first compression unit generates first compressed image data by compressing first image information which is in the second captured image signals and equivalent to the first captured image. A second compression unit generates second compressed image data by compressing second image information which is in the second captured image signals except at least a part of the first image information. A recording unit creates first and second folders, and records the first compressed image data and a first playlist in association with the first folder and the second compressed image data in association with the second folder, so that parts of the first and second compressed image data captured during a same first time unit are recorded in association with each other.

Abstract: An image recording device includes: a reference clock generation generating a reference clock; a first compression unit generating first compressed image data by compressing a first picture that is included in pictures in the captured image and that is equivalent to image captured at the first frame rate; a second compression unit generating second compressed image data by compressing a second picture that is included in the pictures in the captured image except the first picture; a first timestamp generation unit generating a first timestamp indicating a time for presentation of the first picture with reference to the reference clock; a second timestamp generation unit generating a second timestamp indicating a time for presentation of the second picture with reference to the reference clock; a first assignment unit assigning the first timestamp to the first compressed image data; a second assignment unit assigning the second timestamp to the second compressed image data; and a recording unit recording, to t

Abstract: An image recording/reproducing device of this invention includes the following units. An image signal processing unit generates second captured image signals according to a second method. A first compression unit generates first compressed image data by compressing first image information that is image information included in the second captured image signals and that is equivalent to the first captured image. A second compression unit generates second compressed image data by compressing second image information that is image information included in the second captured image signals except at least a part of the image information included in the first image information. A recording unit creates first and second folders, records the first compressed is image data and first control information for reproducing the first compressed image data in association with the first folder, and records the second compressed image data in association with the second folder.

Abstract: An optimal interpolation frame is achieved by estimating optimal motion vectors both for a coding process and an interpolation frame generating process. A video codec apparatus coding and decoding a video and generating an interpolation frame in the decoding includes a motion vector estimation unit calculating an evaluation value to evaluate a correlation between images using a calculating formula and estimates a motion vector using the evaluation value, a motion vector coding unit coding video data using the motion vector and outputs a coded stream, video decoding unit decoding the coded stream and outputs video frames generated by the decoding, a frame interpolation unit generating interpolation frame using the motion vector, a cost calculating formula selecting unit selecting the calculation method depending upon whether the coding by the motion vector coding unit or the generating an interpolation frame by the frame interpolation unit is being executed.

Abstract: A device is provided for taking high resolution still pictures while recording video without pausing video recording. Plural channels are provided for reaching pixel values from a CMOS sensor, and the output of each channel is input to a corresponding A/D conversion circuit. The channels are configured so that the pixels that are added together are read simultaneously. The data added by the pixel value adder is used as the video data for video recording. When a still picture is captured during video recording, the pixel data is stored in memory with capacity to store one frame, and is sequentially output from the image sensor as the still picture data.