摘要:
A reproducing apparatus for reproducing digital data from a recording medium, the digital data including information data and ID data of the information data. The reproducing apparatus checks the reliability of currently reproduced ID data by using the current ID data and ID data reproduced before the current ID data, and corrects an error in the reproduced information data in accordance with the reliability check result.
摘要:
At least one exemplary embodiment is directed to an image coding apparatus configured to encode moving image data including: a coding unit configured to encode each picture in the moving image data in a unit of a first block; a luminance change detection unit configured to divide the moving image data into a plurality of second blocks and to detect a luminance change block in which a luminance change occurred from the plurality of the second blocks in one picture; and a code amount adjustment unit configured to increase an amount of code allocated to the first block if the first block corresponds to the luminance change block detected by the luminance change detection unit.
摘要:
An image signal processing apparatus for quantizing an inputted moving image signal according to a quantization step so that a code amount of one frame becomes a target code amount, and for variable-length-coding the quantized moving image signal, in which a minimum value of the quantization step is determined for each frame, and the quantization step is determined so as not to be less than the minimum value.
摘要:
An image capture apparatus generates video data from captured images, and generates a video PES (packetized elementary stream) from the video data. The image capture apparatus converts the video PES into a MPEG-2 program stream, and converts the video PES into a MPEG-2 transport stream. The image capture apparatus records the MPEG-2 program stream on a random-access recording medium, and transmits the MPEG-2 transport stream to an external device. The conversion from the video PES into the MPEG-2 program stream and the conversion from the video PES into the MPEG-2 transport stream are performed in parallel thereby enabling the image capture apparatus to perform the recording of the MPEG-2 program stream and the transmission of the MPEG-2 transport stream in parallel.
摘要:
An image signal processing apparatus for quantizing an inputted moving image signal according to a quantization step so that a code amount of one frame becomes a target code amount, and for variable-length-coding the quantized moving image signal, in which a minimum value of the quantization step is determined for each frame, and the quantization step is determined so as not to be less than the minimum value.
摘要:
An image processing apparatus in which an image signal is divided into blocks each comprising a plurality of pixels and a quantization and a variable length encoding are executed so that a code amount of a plurality of blocks lies within a certain range. As a plurality of blocks, the position of the block which is selected at the nth order approaches the periphery of a picture screen with an increase in value of (n).
摘要:
When input data is written into or read out from a plurality of memories, operations of the plurality of memories are controlled in a manner such that, as for data which is read out from a predetermined memory among a plurality of memories each of which can store the input data, the data stored in the other memory is set to the read data from the predetermined memory. By virtue of this construction, even when the read data is uncorrectable data, the data with a higher correlation can be read out and a reproduction signal of a higher quality can be obtained.
摘要:
An encoding control apparatus is disclosed that includes a variance calculation unit configured to calculate a variance of an encoding target macroblock; a sum-of-absolute-difference calculation unit configured to calculate a sum of absolute differences between the encoding target macroblock and a reference macroblock; a setting unit configured to set, based on the variance and the sum of absolute differences, a standard for determining whether to skip encoding of the encoding target macroblock; a prediction unit configured to perform motion compensation prediction on the encoding target macroblock to obtain a motion-compensated prediction value; and a determination unit configured to determine whether to skip encoding of the encoding target macroblock by comparing the motion-compensated prediction value with the standard. Related apparatuses and methods are also disclosed.
摘要:
An image signal processing apparatus for quantizing an inputted moving image signal according to a quantization step so that a code amount of one frame becomes a target code amount, and for variable-length-coding the quantized moving image signal, in which a minimum value of the quantization step is determined for each frame, and the quantization step is determined so as not to be less than the minimum value.
摘要:
Disclosed is a novel .beta.-lactam compound, a 7-substituted-2-oxa-7-azabicyclo�3.2.0!heptan-6-one represented by the general formula ##STR1## in which R is an alkyl, cycloalkyl, aryl, halogen-substituted aryl or alkaryl group, having usefulness as an intermediate for the synthesis of various biologically active compounds. The compound can be prepared by the reaction of an isocyanate compound RNCO, R being the same as above, and 2,3-dihydrofuran, preferably, under pressurization up to 2000 atmospheres or higher.