摘要:
Components include: an audio input, an audio output, a signal processor, a buffer memory, an interface, a command input, a display, and a controller. When a record command is input, the controller detects a non-sound section of the audio signal input, generates time data corresponding to the non-sound section, forms a data transmission block using the time data and sound data, records the result into an IC memory card, and registers a list of the newly recorded content at a content table. When a reproduction command is input, the controller reads the start/end address of a selected musical piece with reference to the TOC which is loaded into the buffer memory from the IC memory card, accesses the corresponding audio data from the IC memory card, and controls the system according to a reproduction operation. Silence sections are only stored at the beginning of a musical piece.
摘要:
A memory card is formatted so as to provide a first index area for storing a chapter attribute table made up of attribute information corresponding to a plurality of chapters, each chapter formed by a plurality of clusters required for performing a one-time recording of sequential information into a data area, a second index area for storing a cluster table made up of the used information of each cluster corresponding to the order of clusters of the data area, a data area divided into a plurality of clusters, and a card management information area for storing card management information including the information regarding recorded data, information regarding an associated application device relating to the recorded data and information regarding the number of recorded chapters, arranged in that order. According to one aspect of the memory card, a defective block redundant area advantageously can be provided between the data area and the card management information area. This format promotes utilization of the memory card as a recording medium for storing all types of digital information irrespective of the specific application field or the specific data type. Methods adapted for recording, reproducing and erasing the memory card are also described. A used card can be initialized so as to be reused regardless of differences in the kind of information or the type of device employed, thereby enhancing the practical use of the card and increasing its compatibility.
摘要:
A pilot controlled diaphragm shut-off valve (13) includes a cushion body (22) disposed in a pilot pressure chamber (20). The cushion body (22)operates to gradually allow the build up of pressure in the pilot pressure chamber (20) as water enters through a pilot orifice (21a) into the pilot pressure chamber (20). Such gradual pressure build up in the pilot pressure chamber (20) allows a gradual closing velocity of the shut-off diaphragm valve (13) and thereby eliminates the water hammer phenomena. An actuating diaphragm (32) is provided for opening and closing a pilot valve (24). Alternatively, a float (43) may be employed for opening and closing the pilot valve (24). Either the actuating diaphragm (32) or the float (43) is linked to a stem (23) and lever (26) mechanism, or alternatively to a magnetic linkage (40, 41, 42a).
摘要:
A system decoder for high-speed data transmission in an optical disc reproducing apparatus. The system decoder includes a track buffer memory; a first FIFO (first-in, first-out) memory for receiving data descrambled and error-detected and outputting the data by a unit of plural words; a second FIFO memory for receiving data from the track buffer memory and outputting the data by the unit of plural words; and a track buffer controller writing the data in the first FIFO memory into the track buffer memory in a page mode, and reading the data written in the track buffer memory in a page mode to output the read data to the second FIFO memory. The track buffer memory includes a data area into which main data is written; an error information area into which error information for the main data is written; and a microcomputer area into which a microcomputer of the optical disc reproducing apparatus writes data.
摘要:
A system decoder having error correcting memories for high-speed data transmission and a method for controlling the same. A system decoder of an optical disk reproducing apparatus having a descrambler for restoring scrambled data in the process of encoding data, includes first and second memories for correcting an error, and a memory controller for transmitting error-corrected data to the descrambler while data read and demodulated from the optical disk is written in one of the first and second memories, and error-correcting data written in the other memory while the demodulated and error-corrected data is written and read.
摘要:
A method for playing back multiple kinds of optical discs includes making a decision as to whether a played back optical disc is classified into a digital video disc (DVD) or compact disc (CD) class, detecting the synchronization pattern of the identified disc class, reading a data stream from the optical disc by controlling the voltage controlled oscillation and the constant linear speed of the disc according to the identified disc class, decoding the data stream into the identified disc class according to the detected synchronization pattern, and transferring the decoded data stream to an audio/video decoder or a ROM decoder.
摘要:
A device for controlling a multidomain memory of an optical disk player which performs demodulation, error correction and descrambling for information data reproduced from an optical disk, and transmits data descrambled to an audio/video decoder or ROM decoder. The device for controlling the multidomain memory includes a memory for reading or writing data modulated, error-corrected or descrambled by the disk player, the memory including a plurality of units each of which has a characteristic number; a demodulation address generator for counting a clock which latches the demodulated data; an error correction address generator for generating an address signal for reading data to be error-corrected from the memory; a descramble address generator for generating an address signal for storing the descrambled data into the memory; a record/reproduction controller for generating signals required for accessing the memory in order to record or reproduce data; a data output address generator for generating an address signal for reading data to be transmitted from the memory when a data transmission request signal is received from the audio/video decoder or the ROM decoder; and a memory state controller for judging whether a memory state is in overflow, underflow or empty by comparing the addresses generated from the address generators with a predetermined critical value, so as to command the record/reproduction controller not to record any more, or to generate a signal indicating the memory state.
摘要:
A recorder for an IC memory card (37) using a NAND-type flash memory assigns a single address to both audio and video source data, matching a structure of the NAND-type flash memory. Consequently, the audio and video source data may be recorded with a single address. The recorder includes a first memory (32) for accessing video data in units of a basic region of one page in the NAND-type flash memory, and a second memory (33) for accessing audio data in units of a dummy region of one page in the NAND-type flash memory. A first latch (34) and a second latch (35) match the timing of the video data and the audio data, respectively, accessible from the memories (32, 33). A page memory (36) records the video data output via the first latch (34) and then records the audio data output via the second latch (35) sequentially to thereby store data of a whole one-page unit. A controller (31) is provided for accessing the video data in units of a basic region from the first memory (32), accessing the audio data in units of a dummy region from the second memory (33), and enabling the first and second latches (34, 35) to be latched in order to sequentially record the audio and video data together in the page memory (36). Then a single address is assigned, in the IC memory card, to a one-page unit data stored in the page memory (36) to record the one-page unit of data, containing both audio and video information.
摘要:
Disclosed is an inexpensive and miniaturized digital video disc playback device having a system decoder capable of error correcting and data buffering by means of a single memory without employing separate error correcting and data buffering memories. The inventive system decoder for demodulating, error correcting, deinterleaving and descrambling of data reproduced from a disc in the digital video disc playback device, includes a memory and a memory controller for generating memory control signals for accessing the memory to record and read data when demodulating, error correcting and descrambling the reproduced data.
摘要:
An apparatus for controlling an access to a memory in a system decoder of a digital video disk player. The digital video disk player includes several devices which access the memory. A memory controller connected to the devices and a data/address bus controls access to the memory. A priority order controller allows the devices to access the memory according to a predetermined priority order. The priority order controller generates acknowledgement signals to the corresponding devices in response to request signals generated from the devices. If two or more request signals are simultaneously generated from the devices, the priority order controller generates an acknowledgement signal to the appropriate device according to a predetermined priority order of the devices. Further, the acknowledgement signal is deactivated, if an access actuation signal is deactivated.