Abstract: The present invention provides a process for producing silylated pullulan, which features reacting pullulan with N,O-bistrimethylsilylacetamide by using, as a reaction medium, only one of N-methyl-2-pyrrolidone and N-ethyl-2-pyrrolidone or a mixed solvent of both of them. Compared with conventional processes, the process according to the present invention can produce high-purity silylated pullulan simply, easily and efficiency.

Abstract: The present invention relates to an information processing apparatus and method which make it possible to transmit image data with high quality and low delay in more versatile situations. A control unit 111 obtains negotiation information including a transmission-allowed bit rate of a transmission line 103, which is defined in a standard, information regarding a receiving apparatus, or a measured value of the transmission-allowed bit rate, controls whether or not to encode image data and transmit the encoded image data, and performs settings in encoding, such as a resolution, a bit rate, and a delay time. Also, an encoding unit 113 controls a decomposition number of a chrominance component in accordance with the format of image data to be encoded. The present invention is applicable to, for example, a communication apparatus.

Abstract: Disclosed herein is an information processing apparatus including: a partial decoder configured to decode a portion of a first code stream representative of coded image data into baseband image data; and an encoder configured to encode the baseband image data from the partial decoder into a second code stream having a format converted from the format of the first code stream, wherein the encoder encodes the baseband image data using a target value for parameters with respect to the second code stream, into the second code stream having the format thereof, and the partial decoder determines the portion to be decoded of the first code stream, using the target value, and decodes the determined portion of the first code stream.

Abstract: The present invention relates to an encoding device and method, a decoding device and method, and a transmission system, wherein image data which is subjected to compression encoding and sent out can be output as decoded images at the receiving side in a short time. At the time of wavelet transformation, filtering processing is performed in increments of lines, with a number of lines, whereby coefficient data for one line worth of lowest band component is generated, as an increment. At the first time, processing of line No. 1 through line No. 7 is processed, highband component coefficient C1, coefficient C2, and coefficient C3, and lowband component coefficient Ca, coefficient Cb, and coefficient Cc, are generated at division level=1, and at division level=2, highband component coefficient C4 and lowband component coefficient C5 are further generated from coefficient Ca, coefficient Cb, and coefficient Cc.

Abstract: An apparatus and a method for compressing a picture by wavelet transform and entropy coding, in which the processing load of arithmetic coding may be relieved and rate control may be carried out effectively, while still maintaining the picture quality. An encoding object prediction unit predicts bitplanes to be encoded and extracts only those bitplanes which are to be encoded. An EBCOT unit generates an encoding pass from one bitplane to be encoded to another to execute arithmetic coding. In controlling the code volume to a target code volume, a rate controller sums the arithmetic codes in a sequence from the arithmetic code with the highest bit position in the totality of the code blocks of an input picture to the arithmetic code of the lowermost bit, from one bitplane to another or from one encoding pass to another, and halts the summation when the predetermined target code volume is exceeded.

Abstract: Disclosed herein is an information processing apparatus including: a partial decoding block configured to generate picture data by partially decoding a reversibly encoded picture code stream; an irreversible encoding block configured to encode irreversibly the picture data generated by the partial decoding block; and a control section configured to control the partial decoding block to determine the picture code stream part to be decoded in such a manner that a target compression rate of the picture data generated by the partial decoding block constitutes the compression rate corresponding to a target code quantity for the irreversible encoding block.

Abstract: In a calibration system for conducting calibration by using a patch sheet produced on the basis of data to form measurement patches with respective different densities arranged in a predetermined direction and reference patches with a constant density arranged in the vicinity of the measurement patches for each color toner, the calibration system is provided with a correcting section to correct, on the basis of the calorimetric values of the reference patches, the calorimetric values of the measurement patches arranged in the vicinity of the reference patches.

Abstract: An image compression apparatus and method which compression-encode an input moving image signal according to a JPEG2000 system and record the acquired encoded code stream in an MXF file, are provided. The image compression apparatus includes an encoding unit that compression-encodes each frame constituting an input moving image signal according to a JPEG2000 system to generate an encoded code stream for each frame, a file header generating unit that temporarily generates a file header of the MXF and records at least information for identifying a JPEG2000 system and size information of each encoded code stream generated by the encoding unit in the file header, a file body generating unit that records each encoded code stream generated by the encoding unit in the file body of the MXF, and a file generating unit that generates an MXF file at least from the data recorded in the file header and the data recorded in the file body.

Abstract: A system allows data transfer in which the most appropriate packet processing is executed according to the performance of a terminal. A data transmission side stores scalable-encoded data in a packet as a payload, assigns priority-level information corresponding to a layer level of the encoded data stored in the packet to a packet header, and transmits the packet. A data receiving side performs processing by referring to the priority-level information. A level of priority dependent on an application is specified in an RTP payload header according to the degree of importance of scalable-encoded data, and a level of priority is further specified in an IP header. The most appropriate packet processing based on the performance of a terminal is allowed. Re-transmission control based on the layer level of encoded data is also allowed.

Abstract: In an image encoder, a first quantization section which is selected when normal image quality is required performs quantization by dividing a wavelet transformation coefficient by a quantization step size and by thereafter rounding down a fraction thereof. On the other side, a second quantization section which is selected when high image quality is required performs quantization by dividing a wavelet transformation coefficient by a quantization step size, by adding 0.5 to the addition result, and by thereafter rounding down a fraction thereof. Therefore, the width of a dead zone where coefficients are quantized to a value of 0 is narrower than that in the first quantization section, and higher image quality is obtained accordingly.

Abstract: JPEG-2000 data is formatted into RTP packets for transmission through the Internet. A priority field is provided in the format, and a value indicating the importance of a code stream included in a packet is stored therein. A type field indicates a payload type of a JPEG-2000 code stream. An mh_id field is provided as an identifier of a main header of the JPEG-2000 code stream and indicates a change in the main header. An mh_length field indicates the length of the main header and a fragment offset field stores the number of offset bytes from the start of an image of the packet.

Abstract: Disclosed herein is an information processing apparatus configured to process a code stream having a first resolution with data having the first resolution scalably encoded, including setting means, first creating means, authoring means, second creating means, and code stream replacing means.

Abstract: The present invention relates to an information processing apparatus and method which make it possible to transmit image data with high quality and low delay. A wavelet transform unit 101 applies wavelet transform to image data using a reversible filter that performs data transform with a reversible method that completely ensures forward direction and backward direction transform. An entropy coding unit 103 encodes coefficient data using a predetermined entropy coding scheme, with a reversible method that completely ensures forward direction and backward direction transform. The present invention is applicable to, for example, an encoding apparatus or a decoding apparatus.

Abstract: The present invention relates to an encoding device and method, a decoding device and method, and a transmission system, wherein encoding and decoding can be performed at higher speeds. A maximum significant digit calculating unit 63 calculates the maximum significant digits of predetermined w quantized coefficients. A VLC encoding unit 64 outputs code indicating a maximum significant digit, based on the calculation results. A significant digit extracting unit 65 extracts the significant digits of each of w quantized coefficients based on the maximum significant digit. A VLC encoding unit 66 outputs code indicating the absolute values of the w quantized coefficients, based on the extracted significant digits. A sign extracting unit 67 extracts signs from the w quantized coefficients, indicating whether each quantized coefficient is positive or negative. A VLC encoding unit 68 outputs code indicating w signs.

Abstract: The present invention relates to an encoding apparatus, an encoding method, an encoding program, a decoding apparatus, a decoding method and a decoding program for encoding and decoding efficiently a video signal in interlace scanning. An adder 12 and a subtractor 13 respectively perform addition and subtraction operations on an odd field and an even field of moving image data in interlace scanning. An intra encoder 14 and an intra encoder 15 wavelet transform addition image data and subtraction image data, quantize transform coefficients W, and entropy encode quantization coefficients q. Encoded data output from the intra encoder 14 and the intra encoder 15 is multiplexed into a single encoded stream to be output. Since data with the addition and subtraction operations performed on the odd field and the even field thereof is encoded, dynamic range is doubled while compression efficiency is increased.

Abstract: The present invention relates to an encoding apparatus, an encoding method, an encoding program, a decoding apparatus, a decoding method and a decoding program for adaptively controlling an encoding bit rate. Coefficient data obtained using wavelet transform is quantized, and segmented into bit planes. The coefficient data is entropy encoded from the bit plane of the MSB in a direction from an upper bit position to a lower bit position. Entropy encoding is stopped at a bit position where an amount of code has reached a target amount. On the bit plane, the coefficient data is entropy encoded from a lower frequency region to a higher frequency region. Data greatly affecting subjective image quality of a decoded image is selectively output while the amount of code is easily controlled.

Abstract: An apparatus and a method for compressing a picture by wavelet transform and entropy coding, in which the processing load of arithmetic coding may be relieved and rate control may be carried out effectively, while still maintaining the picture quality. An encoding object prediction unit predicts bitplanes to be encoded and extracts only those bitplanes which are to be encoded. An EBCOT unit generates an encoding pass from one bitplane to be encoded to another to execute arithmetic coding. In controlling the code volume to a target code volume, a rate controller sums the arithmetic codes in a sequence from the arithmetic code with the highest bit position in the totality of the code blocks of an input picture to the arithmetic code of the lowermost bit, from one bitplane to another or from one encoding pass to another, and halts the summation when the predetermined target code volume is exceeded.

Abstract: The present invention is applied to for example video cameras recording an image pickup result by moving picture, electronic still cameras, monitoring devices and the like. Image pickup means 3 and image compressing means 6 are connected to each other by a wiring layer formed on a surface on an opposite side from an image pickup surface of the image pickup means 3, and are thereby integrated with each other. A data compression ratio used for data compression of at least a next block is changed on the basis of an amount of code generated by data compression of an image pickup result S1 in a block unit. Also, the image pickup result S1 of each photoelectric conversion unit is output from the image pickup means 3 in such a manner as to correspond to the processing in the block unit.

Abstract: An information processing device includes: an accumulating unit for accumulating encoded data obtained by encoding image data; a reading unit for reading out the encoded data in data increments; a determining unit for determining whether or not a parameter indicating the accumulated state of the encoded data at the accumulating unit satisfies a predetermined accumulation condition; a forbidding unit for forbidding readout of encoded data to be read out following encoded data being read out by the reading unit in data increments, which serves as a reference, in the case of the determining unit determining that the parameter satisfies the accumulation condition; and a control unit for controlling the reading unit to omit readout of encoded data of which readout is forbidden by the forbidding unit in data increments, and performing readout of encoded data of which readout is not prohibited by the forbidding unit in data increments.

Abstract: In an image encoder, a first quantization section which is selected when normal image quality is required performs quantization by dividing a wavelet transformation coefficient by a quantization step size and by thereafter rounding down a fraction thereof. On the other side, a second quantization section which is selected when high image quality is required performs quantization by dividing a wavelet transformation coeffient by a quantization step size, by adding 0.5 to the dividing result, and by thereafter rounding down a fraction thereof. Therefore, the width of a dead zone where coefficients are quantized to a value of 0 is narrower than that in the first quantization section, and higher image quality is obtained accordingly.