摘要:
A single-chip application specific integrated circuit provides autonomous management of playback of digital video and audio. The chip includes a digital video decoder and output system, and a central processing unit controlling said digital video decoder and output system. The central processing unit receives commands to establish a current playback state for management of playback of digital video and audio by said digital video decoder and output system, and responds to a video field synchronization signal and a current playback state, without external instruction, to determine whether to display digital video, whether to decode digital video for display, whether to repeat display of previously decoded digital video, and whether to skip over digital video prior to decoding digital video for output. By delivering commands to the central processing unit, the application specific integrated circuit can be caused to transition between playback states to provide desired playback of said digital video and audio.
摘要:
A decoder decodes full frame MPEG-2 video by a single method that applies regardless of buffer memory and frame rate conversion considerations. A display control module handles frame rate and field sequence in response to host configuration, trick play command signals, and information in the received bitstream. Pictures are decoded as buffer memory for the decoded pictures becomes available, and picture display attributes are assigned and stored in a table, one string for each decoded picture. Frame rate and field sequence are managed in light of memory constraints, to produce a high quality result without re-decoding data.
摘要:
A digital video presentation system is provided with a decoder to decode full frame MPEG-2 video by a single method that applies regardless of buffer memory and frame rate conversion considerations. A display control module handles frame rate and field sequence in response to host configuration, particularly buffer memory size and display type (NTSC or PAL), to host trick play command signals, and to information in the received bitstream. Pictures are decoded as buffer memory for the decoded pictures becomes available, and picture display attributes are assigned and stored in a table, one string for each decoded picture. Field display logic is informed of the to memory address of the next field to be displayed along with the attributes needed for affecting proper field display sequence, and flagging whether the memory is to be freed for use by the decoder as the field is being displayed and whether the decoder is to decode the next picture as the field is being displayed. Where memory is small, opposite field data can be output. Field sequence order is provided for output buffers in the range of from 0.53 to 0.67 frames in size, or a full frame in size. Buffer memory is optimized by maintaining tables of offset variables and accessing a fixed table of memory pointers as fields of data are being displayed. The offset data tables are identified to the display logic, which uses the data in the specified offset table to address rows of memory in which the consecutive rows of particular field to be displayed are stored. The decoder loads offset values into the offset tables as pictures are being decoded and rows of blocks of the picture are stored as memory becomes free.
摘要:
A DVD reproduction apparatus includes a video decoder capable of outputting smooth video data during forward or backward high-speed reproduction. The video decoder is intermittently supplied with data in VOBU (Video Object Unit) units. According to control by a controller, the decoder outputs the decoded I pictures or P pictures from a memory having a capacity of three or more pictures. In a case of forward reproduction, the pictures are outputted according to the time axis, and in a case of backward reproduction, the pictures are outputted in the opposite direction of the decoding order. Moreover, the decoder counts a VOBU passing time through a demultiplexer provided at a preceding stage and outputs respective pictures at averaged intervals. That is, because three pictures are outputted for each VOBU, pictures are outputted at an interval of the averaged VOBU passing time multiplied by ⅓.
摘要:
A data reproduction apparatus and a data reproduction method can alleviate the workload of a special processing operation of fast forward or reverse data reproduction and improve the data access speed for fast reproduction of data. The data reproduction apparatus comprises an optical pickup 2 for reproducing data from an optical disk 1, a sector detector 4 for detecting a first piece of data information indicating if a data is to be output as signal or not, a ring buffer memory 6 for storing data, an error correction circuit 7 for correcting errors in the data to be output as signal as indicated by the first piece of data information out of the stored data, a stream detector 10 for detecting a second piece of data information indicating the data to be out as signal out of the data corrected for errors, decoders 13, 16 for decoding the data corrected for errors and stored in the ring buffer memory 6 as signal to be reproduced and a system controller 22 for control the data to be decoded and the data not to be decoded by referring to the first piece of data information and the second piece of data information detected by a second data information detection means.
摘要:
Conventionally, a particular countermeasure has been taken for each of the error factors. That is, each error requires a circuit and the like for carrying out the countermeasure, which leads to an increase size of the entire circuit. The present invention includes a controller 14 which resets a system time clock STC serving as the system reference time with a time management information PTM in a video decoder 7. This reset time is compared to a time management information PTM or DTM of the video decoder 7 or an audio decoder 11. According to a result of the comparison, the synchronization lag between the video signal and the audio signal is controlled.
摘要:
The objectives of the present invention are to reduce the throughput required for a rapid reproduction or other special types of reproduction and to improve also the data access speed at the time of a rapid reproduction. In order to achieve these objectives, the system controller 19 controls so that the address information of the MPEG data reproduced by a pickup 2 may be used to create the first reproduction control information at a sector detection circuit 4, that the second reproduction control information corresponding to the starting point of pictures contained in the MPEG data destined to be reproduction signals by the first reproduction control signal and subjected to an error correction in an error correction circuit 7 may be created in a stream detection circuit 9, and that some MPEG data out of the entire MPEG data may be outputted for a rapid reproduction by referring to the second reproduction control information, and through these steps, the interval of reproducing I pictures in a rapid reproduction by using for example only I pictures is reduced and a smooth reproduction is achieved.
摘要:
According to one embodiment, an image generation unit generates a first image during a large aperture period and a second image during a small aperture period. An image combining unit generates a composite image based on the latest second image and the specific first image. A display unit displays the composite image in real time. A determination unit determines whether to update the first image based on an index associated with the anatomical positional shift between the first image and the second image. A driving control unit enlarges a aperture to the large aperture, when the determination unit determines to update, and maintains the aperture at the small aperture, when the determination unit determines not to update.
摘要:
According to one embodiment, an image processing apparatus includes following units. The correspondence table describes a relationship between blood vessel contrasts and reference contrast medium concentrations and reference X-ray conditions. The acquisition unit acquires a blood vessel contrast by referring to the correspondence table based on the planned value of a contrast medium concentration and the X-ray condition. The calculation unit calculates a predictive pixel value of a region of interest set on the X-ray image based on the blood vessel contrast. The display unit displays the X-ray image while superimposing a partial image with the predictive pixel value on the region of interest.
摘要:
Gas-insulated bus is provided with: current-carrying conductor disposed along axial direction of metallic container that is filled with insulating-gas; shield fitting through which passes current-carrying conductor and that has depressed portion formed on portion of barrel-shaped outer surface; insulating support that has second end thereof fixed in depressed portion of shield fitting and has first end thereof fixed to metallic-container, and that supports current-carrying conductor via shield fitting; internal conductor being implanted in second end of insulating support and being, along with second end, positioned in depressed portion and fixed to shield fitting; and contact being attached to inner surface of shield fitting, being disposed in space formed on inside of shield fitting, and that makes contact with current-carrying conductor so as to maintain shield fitting and current-carrying conductor at same electric potential, wherein internal conductor has such shape that internal conductor and shield fitting together form barrel-like profile.