摘要:
This invention relates illustratively to a portable video recorder that uses an optical disk. The inventive recorder is arranged to switch the degree of power conservation depending on the length of an idle time T2 during intermittent recording and/or reproduction of continuous data to and/or from the optical disk.
摘要:
A memory controller is equipped with a memory data search circuit for carrying out an identifying operation of management information corresponding to a segment located in front of or behind a segment serving as a reference for an editing operation on a recording medium through search and comparison processing of managing information (U-TOC). The system controller does not receive search data and execute the data search but only sets the comparison standard and an initial value and outputs an execution control signal. The editing operation performed, reduces wasted space on a recording medium, such as a disc, and eliminates "trash areas" which are not addressable in the U-TOC.
摘要:
A memory controller is equipped with a memory data search circuit for carrying out an identifying operation of management information corresponding to a segment located in front of or behind a segment serving as a reference for an editing operation on a recording medium through search and comparison processing of managing information (U-TOC). The system controller does not receive search data and execute the data search but only sets the comparison standard and an initial value and outputs an execution control signal. The editing operation performed, reduces wasted space on a recording medium, such as a disc, and eliminates "trash areas" which are not addressable in the U-TOC.
摘要:
The present invention relates to a skew control method and a skew control unit by which stable skew control can be performed with a simple configuration without the need for a dedicated skew sensor.Focus drive voltages V1 and V2 are measured at a plurality of points P1 and P2 set by moving an optical pick-up 31 in the radial direction of an optical disc 2 in a state where a focus servo of the optical pick-up 31 is ON, and skew angle control is performed so that V1 and V2 are equal to each other.
摘要:
A reproduction apparatus and method a recording apparatus and method by which two different kinds of data can be reproduced and recorded efficiently are disclosed. When main data are intermittently read in from a recording medium, periods within which reading in of the main data is not performed appear inevitably, and the periods are made use of to read in sub data from the recording medium, thereby allowing synchronized reproduction of the main data and the sub data which relate to the main data. On the other hand, when main data are intermittently written onto a recording medium, periods within which writing of the main data is not performed appear inevitably, and the periods are made use of to write sub data onto the recording medium, thereby allowing parallel recording of the main data and the sub data.
摘要:
In a memory control device for controlling the write-in/read-out operation for a memory of a recording/reproducing apparatus, a sector data storing area and an additive area are set in each sector-based data storing area in the memory. A prescribed data is stored in the additive area associated with the sector-based data stored in the sector data storing areas. The access addresses for the additive area are generated on the basis of the sector count value when the sector data write-in or read-out is carried out in the memory. The access addresses are calculated by the memory control device.
摘要:
A reproducing apparatus in which a reproduction signal reproduced from a recording medium is temporarily stored in a memory and is thereafter read out, and in which, when the amount of accumulation of the reproduction signal stored in the memory becomes equal to or larger than a predetermined value, a function of at least one section of the reproducing apparatus is inhibited. A part of at least one of a program read out from the memory before the inhibition of the above-mentioned function and other programs before and after the program read out from the memory is previously stored in the memory. Therefore, even if an access to such a program is requested while the function of the related section of the reproducing apparatus is inhibited, the part of the program can be read out to immediately obtain the desired reproduction output.
摘要:
A data encoder wherein the outputs of a synchronization data generating means 51, a cluster counter 52, a sector counter 53, a recording data output means 56 and a dummy data generating means 55 are selected by a selector 57 to provide an output. A selector control means 59 is constituted to control the selector 57 to output a data group (cluster) which is one recording unit formed of the predetermined number of sectors in the predetermined format by controlling the selector 57 in a predetermined timing depending on a Link signal based on the sector counter 53 and a count value of the byte counter 60. The processing load shared on a microcomputer, which is controlling the recording operation, can thus be alleviated remarkably.
摘要:
A disk recording apparatus (10) is designed for recording predetermined input data D.sub.IN onto a disk-like recording medium (21) having recording tracks on which predetermined absolute address information has been recorded in advance. The disk recording apparatus comprises input memory control means (15), (16) and (17) which successively store the input data D.sub.IN for every predetermined recording units (FB.sub.0), (FB.sub.1), (FB.sub.2), . . . , (FB.sub.N) and read the data from given positions (t.sub.0), (t.sub.1), (t.sub.2), . . . , (t.sub.N) for each of said predetermined recording units to send them to recording means (20) and (22). The apparatus further comprises abnormal condition detection and control means (15) which always monitors the absolute address information on said recording tracks to detect any abnormal condition based on said absolute address information. When abnormal condition has developed, the control means (15) calculates the return time required for said recording means (20) and (22) to return to the head position of said recording unit that is being recorded on the recording track, and controls and records the reading positions (t.sub.0), (t.sub.1), (t.sub.2), . . . , (t.sub.N) of said input memory control means (15), (16) and (17) in advance by the number of recording units that correspond to the calculated result. Probability of elimination of the recorded data is thus avoided even when abnormal condition has developed in the recording means (20), (22) while the input data D.sub.IN are being recorded.
摘要:
A recording and/or reproducing apparatus having a memory controller which controls a write-in and read-out operation of data into the memory. When data are recorded on a disc-shaped recording medium by the recording and/or reproducing unit, the memory controller time-divisionally stores into a first storage area of a memory the data which will be recorded on the disc-shaped recording medium by the recording and/or reproducing unit while simultaneously time-divisionally storing into a second storage area of the memory management data for the disc-shaped recording medium which are read out by the recording and/or reproducing unit.