Patent application number | Description | Published |
20100002765 | Image encoding apparatus and method - An image encoding apparatus includes a calculation unit for calculating complexity from pixel values of an input image, the complexity representing a code amount generated by prediction encoding each block included in a prediction target region of the input image, and an allocation unit for allocating a code amount to each block based on the calculated complexity of each block and an allowable code amount previously set for the prediction target region. The apparatus further includes a determination unit for determining an encoding parameter corresponding to each block based on the complexity of each block and the code amount allocated to each block, and an encoding unit for encoding each block by using the determined encoding parameter of each block. Finally, the apparatus includes a resetting unit for resetting the allowable code amount for a next prediction target region based on an occupancy amount of a buffer. | 01-07-2010 |
20100177821 | Moving picture coding apparatus - A moving picture coding apparatus divides a picture into basic blocks and generates a prediction image of a block to be predicted in a basic block by using adjacent pixels in reference pixel blocks adjacent to the block to be predicted as reference pixels to perform predictive coding of a moving picture. When some of the reference pixels are not available, pixel values of the reference pixels that are not available are calculated based on pixels in the reference pixel blocks. The prediction image of the block to be predicted is generated by using the calculated pixel values instead of the reference pixels that are not available. | 07-15-2010 |
20140376620 | IMAGE ENCODING DEVICE AND IMAGE ENCODING METHOD - Provided are a highly efficient image encoding device which is achieved by quantization of each sub-block in accordance with visual characteristics, and a quantization method that uses the image encoding device. An input image is divided into macro-blocks having a prescribed first size, each of the divided macro-blocks is divided into sub-blocks having a prescribed second size, and each of the sub-blocks is encoded using a same or different quantization parameter for each of the sub-blocks. As a result, by executing quantization for each of the sub-blocks in accordance with the visual characteristics, highly efficient image encoding and image decoding devices can be provided. | 12-25-2014 |
Patent application number | Description | Published |
20090103816 | Method and Device of Image Encoding and Image Processing Apparatus - Provided is an image encoding method and device capable of encoding moving image random allowing access with low delay and high compression. The image encoding method which inputs image data and encodes the image data using a reference picture about the image data and a difference between the reference picture and the image data, and performs the steps of: setting an image output availability parameter indicating that it is possible to decode the image data to output the same if past pictures fall within a fixed range have been decoded, when decoding the image data which has been encoded; calculating influenced range information indicating a range where pictures encoded in the past influence a target picture to be encoded when encoding the image data; and controlling a range of the reference picture upon encoding such that the influenced range information calculated does not exceed the image output availability parameter. | 04-23-2009 |
20100080288 | VIDEO COMPRESSION CODING METHOD AND APPARATUS - A first delay memory is input with an input image frame output from a ME (motion estimation) processor, and delays output to a first adder for carrying out a prediction residual generation process a predetermined time period. A second delay memory is input with an inter-prediction luminance image frame, and delays output to a prediction selection circuit a predetermined time period. A third delay memory is input with motion vector information output from the ME processor, and delays output of the motion vector information to an inter-prediction chrominance image creation processor a predetermined time period. | 04-01-2010 |
20100135381 | ENCODING/DECODING DEVICE AND VIDEO TRANSMISSION SYSTEM - The present invention relates to a video transmission system that uses an encoding/decoding technique. An object of the present invention is to refrain from using a memory for storing decoded image data, avoid a decoder input buffer problem (buffer overflow or underflow) with ease, achieve cost reduction, and provide enhanced image quality. In the video transmission system with an encoding/decoding device, a reference signal for adjusting a synchronization schedule of the entire system is generated and supplied to various sections. In addition, a timing adjustment amount for adjusting the synchronization schedule for the reference signal is generated by a decoder and supplied to a camera. | 06-03-2010 |
20110110424 | Video Encoder and Data Processing Method - A video encoder for evaluating a prediction error by using a prediction technique include: an image encoding section which encodes a prediction image; and an encoding control device which selects any one of a plurality of prediction modes in prediction used by the image encoding section. The image encoding section performs clipping of higher-order bits of the prediction error input to the encoding control device and reduction of lower-order bits thereof for each of the prediction modes to control prediction mode selection, thus reducing the prediction error bit width to a predetermined bit width. The encoding control device sets to the image encoding section the number of higher-order bits to be clipped and the number of lower-order bits to be reduced. The predetermined bit width of the prediction error after bit width reduction is matched with the bus width used for prediction error transmission by the encoding control device and the image encoding section. | 05-12-2011 |
20120263240 | VIDEO ENCODING AND DECODING DEVICE - Disclosed is a video encoding and decoding device which encodes images and compresses the information volume in accordance to the standard H.264. In the device, image folding determination processing is performed utilizing the symmetry of an input image, and a block of one area of the input image is set to be a folding area. By setting folding points describing the folding area, only information for the folding area and the folding points is encoded. After decoding, the entire image is restored from the folding area, which was the encoded area, but in areas that cannot be directly restored from the folding area, the image is restored by performing padding from peripheral blocks. By this means, the symmetry of an image is utilized to increase encoding efficiency without degrading image quality. | 10-18-2012 |