Abstract: A video encoding device includes a planar prediction unit using planar prediction, and a noise injecting unit for injecting pseudo-random noise into a prediction image of a planar prediction block when a reconstructed prediction error value for planar prediction is less than a threshold determined by the size of the planar prediction block. The video encoding device then uses the pseudo-random noise in linear interpolation for calculating the prediction image, based on the conditions under which a gradient distortion occurs, to suppress the gradient distortion.

Abstract: A video encoding device includes an intra prediction unit for performing intra prediction on an image, a frequency transform/quantization unit for frequency transform and quantizing a prediction error based on the intra prediction performed by the intra prediction unit, an entropy encoding unit for entropy-encoding a transform quantization value generated by the frequency transform/quantization unit, an edge detection unit for detecting edge information on an image block of the minimum frequency-transform block size of the image, and edge information storage unit for storing the edge information detected by the edge detection unit.

Abstract: A terminal has a visual axis by using which a user points to a target object. An information generating server acquires an internal image or an external image of the target object pointed by a user, and generates a display image which is displayed on the terminal.

Abstract: A video encoding device includes: transform means 11 for transforming an image block; entropy encoding means 12 for entropy-encoding transformed data of the image block transformed by the transform means 11; PCM encoding means 13 for PCM-encoding the image block; multiplex data selection means 14 for selecting output data of the entropy encoding means 12 or the PCM encoding means 13, in a block of a block size set from the outside; and multiplexing means 15 for embedding a PCM header in a bitstream, in the block of the set from the outside block size.

Abstract: The present invention is a video encoding device having: video encoder for encoding an inputted video on the basis of a prediction; reference picture compressor for compressing a reference picture used for the prediction; storage for storing the compressed reference picture; reference picture decompressor for decompressing the compressed reference picture stored in the storage; compression and decompression controller for controlling the reference picture compressor and the reference picture decompressor on the basis of predetermined control information; quantized information encoder for encoding a portion of the control information of the compression and decompression control means by means of a predetermined method and for generating a quantized information bitstream; and multiplexer for multiplexing the video bitstream from the video encoder, at least a portion of the control information excluding the portion that was encoded by means of the quantized information encoder, and the quantized information bits

Abstract: In the present invention, reconstructed images for prediction are stored in uncompressed reference picture memory and compressed reference picture memory. A video decoder stores in uncompressed reference picture memory a reconstructed image of a frame to be decoded which has been generated on the basis of a prediction, and among reconstructed images which have been stored in the uncompressed reference picture memory, compresses a reconstructed image that will not be used for prediction of the frame to be decoded and stores the image in the compressed reference picture memory. Using the reconstructed images which are stored in the uncompressed reference picture memory and the compressed reference picture memory, the video bitstream is decoded into a video.

Abstract: A video encoding device and a video decoding device prevent an increase in the number of lines of a reference line buffer in a pseudo random noise injection process. The video encoding device includes: an inverse quantization unit for inverse-quantizing a quantization index to obtain a quantization representative value; an inverse frequency transform unit for inverse-transforming the quantization representative value obtained by the inverse quantization unit, to obtain a reconstructed image block; and an asymmetrical distortion removal filter unit for injecting pseudo random noise to an area asymmetrical about a boundary of the reconstructed image block.

Abstract: When injecting pseudo random noise to an area centered on a block boundary, a video encoding device and a video decoding device prevent injection of pseudo random noise to an area including a reference image for subsequent planar mode filtering, in order to suppress linear artifacts. The video encoding device includes: an inverse quantization unit for inverse-quantizing a quantization index to obtain a quantization representative value; an inverse frequency transform unit for inverse-transforming the quantization representative value obtained by the inverse quantization unit, to obtain a reconstructed image block; and an adaptive distortion removal filter unit for injecting pseudo random noise to an area centered on a boundary of the reconstructed image block, wherein the adaptive distortion removal filter unit does not inject pseudo random noise to an area including a reference image for planar mode filtering.

Abstract: To efficiently reduce contour and stair-step artifacts. A video encoding device includes an inverse quantization means for inversely quantizing a quantization index to obtain a quantization representative value, an inverse frequency transformation means for inversely converting the quantization representative value obtained by the inverse quantization means to obtain a reconstructed image block, and a noise inject means for determining a pseudorandom noise injecting position based on information on extension of the reconstructed image block and injecting a pseudorandom noise into an image at the pseudorandom noise injecting position.

Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.

Abstract: A dynamic image encoding technique provides high image quality encoding while eliminating the formation of a subjectively undesirable vector field. A dynamic image encoding device includes: an inter-frame predictor, a motion vector calculator, a prediction motion vector calculator, a skip mode motion vector calculator, and a skip mode validity judger. The skip mode validity judger calculates a code amount of a differential motion vector of the motion vector estimated by considering the motion vector of the skip mode and the subjective image quality, and uses a value of the code amount of the differential motion vector weighted by a block quantization parameter for the skip mode validity judgment.

Abstract: When entropy-encoding a converted quantized amount obtained by converting an image into a frequency region and quantizing it, if the output code bit quantity of the entropy encoding exceeds a predetermined amount, an image obtained by rebuilding the converted quantized value is outputted from an image encoding device. This guarantees an encoding delay caused by re-encoding to be a constant time without increasing the circuit size of the encoding device and provides an image encoding device of a subjectively high quality.

Abstract: An image encoding apparatus, an image encoding method, and an image encoding program capable of minimizing image degradation, controlling a code amount in units smaller than a picture, and ensuring that encoding of the picture is completed within a certain time period is provided. A symbol number estimating device estimates the total bin number of a plurality of macro blocks constituting a picture. An entropy encoding selector outputs the entropy encoding mode selecting signal to an entropy encoder using the inputted bin number, in order to select one of a CABAC device or a VLC device. A CPU performs image encoding by executing a control program stored in a program storing portion.

Abstract: A video encoding method comprises the steps of converting syntax data of an image block into a binary sequence; encoding each symbol of the binary sequence subject to its corresponding context; estimating the number of bits required for the binary arithmetic encoding of the syntax data of the image block; deciding whether to encode the syntax data of the image block to output it responding to the estimated bit number; and updating the context corresponding the syntax data decided to be encoded and to be outputted and not updating the context corresponding to the syntax data decided not to be encoded and not to be outputted. The estimating step uses the maximum value of the number of arithmetic encoding output bits for its input symbols as the aforementioned number of bits.

Abstract: To efficiently reduce contour and stair-step artifacts. A video encoding device includes a reconstruction means for adding an intra prediction signal or an inter-frame prediction signal to a reconstructed predictive error image block obtained by an inverse frequency transformation means to obtain a reconstructed image block, a noise inject means for injecting a pseudorandom noise into a reconstructed image picture, a Wiener filter means for applying a Wiener filter to the reconstructed image picture with a pseudorandom noise injected, and a reference image storage means for storing the reconstructed image picture to which the Wiener filter is applied as a reference image picture for inter-frame prediction.

Abstract: If a reference frame displayed at the reproduction side immediately before a current image frame to be encoded is an inter encoding image frame, a quantization control device (999) appropriately corrects the level (quantization value) of an intra encoding so as to visually reduce I-frame flicker caused by a difference between the inter encoding noise characteristic of the inter encoding image frame and the noise characteristic of the current intra encoding.

Abstract: An intra-forecast mode selecting method is provided to select an intra-forecast mode suitable for intra-forecast coding of a coding subject block from intra-forecast modes including a DC intra-forecasting mode based on a difference in forecast between a coding amount of the intra-forecast mode and an intra-forecast. The intra-forecast mode selecting method is comprised of intra-forecast mode selecting means for correcting the coding amount of the DC intra-forecast mode to be equal to that of the other intra-forecast or less to select an intra-forecast mode based on a difference in forecast between the coding amount of the corrected DC intra-forecast and the intra-forecast.

Abstract: In macroblocks to which a prediction mode determination step, which determines whether or not a prediction mode applied to the macroblocks is a predetermined prediction mode, and an encoded data selection step, which selects a predetermined type of encoded data corresponding to the pixels at predetermined positions in the macroblocks to which the predetermined prediction mode is applied, are applied, there is provided a bit distribution step for more preferentially distributing bits to a predetermined type of encoded data selected at the encoded data selection step than a predetermined type of encoded data that is not selected at the encoded data selection step in the macroblocks to which the predetermined prediction mode is applied.

Abstract: When an original image in which an object to be concealed is mosaicked is so reduced as to have a low resolution, the mosaic block size at the lowered resolution is computed. It is judged whether or not the concealed object can be perceived by the eye of a human even though the object is mosaicked with the reduced mosaic block size. If so, the concealed object is re-mosaicked with an adequate re-mosaic block size. With this, even for a reduced image reduced by lowering the resolution of the original image in which the object to be concealed is mosaicked, the privacy of the concealed object can be protected.

Abstract: The present invention seeks to provide a solution to the problem that motion compensation in an encoding method of the prior art involves decimal point picture element interpolation by means of fixed filters and therefore cannot realize interpolation of decimal point picture elements that accords with the nature and bit rate of a moving picture.