摘要:
A data transmission system suitable for effectively transmitting variety of data such as NTSC, PAL, and MPEG between various devices connected to a bus includes a data block generator generates a data block and a discrimination data identifying the generated data block from the source data. A data header generator generates a data header based on the discrimination data. A packet generator and an interface block generates a packet header and CRC error codes to compose a packet with thus generated data block and header.
摘要:
In a data transmission apparatus for transmitting digital video and audio data, a block forming circuit forms a plurality of data blocks of transmission data composed of at least one of digital video data, digital audio data, and digital auxiliary data related to the digital video data and the digital audio data. Thereafter, a grouping circuit groups a plurality of data blocks outputted from the block forming circuit so as to form transmission group data of one transmission unit block having a time length of approximately one three-hundredth second, and then transmits the transmission group data. Further, a classifying circuit preferably classifies the transmission group data into a plurality of sections, by adding section identification data to each transmission group data.
摘要:
An apparatus serving as a digital videocassette recorder (VCR) for recording analog video and audio signals as digital signals. The apparatus serves also as a digital data storage drive. The digital VCR and the storage drive share common circuitry and a common magnetic recording medium. This reduces the cost and enhances the efficiency at which tracks are used. The apparatus has a large storage capacity. The apparatus divides input digital data into two parts and performs error correction encoding for each of these two data parts to form sync blocks. These sync blocks are recorded in an audio signal recording area and a video signal recording area, respectively, on the recording medium. Error correction codes used during reading of digital data are the same as those used during recording of video and audio signals. The same track structure and the same sync block structure are used for these two modes of operation.
摘要:
A pilot signal is superposed and recorded on data at the beginning of each track. The beginning portion of the track is constituted only of codewords having a disparity of each 10 bits which is +2, 0 or -2. Also, the cumulative value of the disparities of every 10 bits may fluctuate in a period coinciding with the period of the pilot signal to be superposed. Therefore, the frequency spectrum in the beginning part of the track has a peak at the frequency of pilot signal, and using this peak as the pilot signal, tracking is controlled during reproduction.
摘要:
A gas supplied from a gas source is exposed to an atmosphere above a liquid surface in a tank saving the liquid and thereafter is supplied around a wafer in a treatment chamber through a gas supply passage and a supply port. The gas supplied around the wafer uniformly flows from around the wafer toward above the center of the wafer and thereafter is discharged from an exhaust port which is formed at the top of the treatment chamber. Meanwhile, with respect to the wafer, heat treatment is performed by a heating mechanism and a predetermined PEB is carried out. The humidified gas is supplied into the treatment chamber, thereby preventing drying in the treatment chamber. Therefore, water in resist is not taken out, resulting in that a required resist pattern can be formed on the wafer.
摘要:
When modulating by an interleaved NRZI technique by inserting one bit per every m bits of input data series, the frequency characteristics of bit rows varying by the polarity ("0" or "1") of the bit to be inserted are compared, and the bit row closer to the desired frequency characteristic is selected as the output series, so that recording is effected by controlling the frequency characteristics of the digital signal.
摘要:
When modulating by an interleaved NRZI technique by inserting one bit per every m bits of input data series, the frequency characteristics of bit rows varying by the polarity ("0" or "1") of the bit to be inserted are compared, and the bit row closer to the desired frequency characteristic is selected as the output series, so that recording is effected by controlling the frequency characteristics of the digital signal.
摘要:
A transmission and reception system includes a transmission apparatus 1 and reception apparatuses 21 and 22. The transmission apparatus 1 transmits a storage identifier for identifying a storage medium and data. The reception apparatuses 21 and 22 each include a receiving section for receiving the storage identifier for identifying the storage medium and the data, and a storage control section for storing the data received by the receiving section on the storage medium identified by the storage identifier received by the receiving section. Hence, automatic storage of data conforming to personal taste and simultaneous automatic storage of data for plural persons are realized.
摘要:
In a data transmission apparatus for transmitting digital video and audio data, a block forming circuit forms a plurality of data blocks of transmission data composed of at least one of digital video data, digital audio data, and digital auxiliary data related to the digital video data and the digital audio data. Thereafter, a grouping circuit groups a plurality of data blocks outputted from the block forming circuit so as to form transmission group data of one transmission unit block having a time length of approximately one three-hundredth second, and then transmits the transmission group data. Further, a classifying circuit preferably classifies the transmission group data into a plurality of sections, by adding section identification data to each transmission group data.
摘要:
The present invention relates to a file system using a disc memory storage and a method of managing the file system. Just like the ordinary server, a first block table Tb1 with the offset number of the file to be written in matched with the block number Dij of the data block is provided, and the data stored in the memory is read out on the basis of the contents of the first block table Tb1. On that file system, a second block registering means is provided which couples the block number allotted to the file to write and the offset number and, in case of consecutive block numbers, prepares a second block table Tb2 in which the first block number of the consecutive block numbers is paired with the offset number. A second take-out means is also provided. When consecutive data are to be read out, the second block take-out means arithmetically processes, on the basis of the contents of the second block table Tb2, the block numbers Dij to be read out and hands over the results to the data read-out means. That substantially reduces the access and processing time for read-out at the block table and makes the reading out of data highly efficient.