公开(公告)号：JPH06309106A

公开(公告)日：1994-11-04

申请号：JP11930493

申请日：1993-04-23

Applicant: SONY CORP

Inventor： MAEDA YASUAKI

IPC: G06F3/06 ,  G06F3/08 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B27/034 ,  G11B27/11 ,  G11B27/30 ,  G11B27/32

Abstract: PURPOSE:To reduce processing burden on a system controller by storing additional data in a buffer RAM corresponding to sector data. CONSTITUTION:An additional area capable of storing the additional data corresponding to the sector data is set at each area of the buffer RAM 13, and information annexed to the sector data is read out when the sector data is read out, and it is used in every kind of operation management. Thus, a memory controller 12 is provided, and an address counter 34 generates a write address and a readout address based on address designation data, mode information, and the sync data of a sector, and a bicount signal, etc., and outputs them to the buffer RAM 13. An address in the additional area for additional data is calculated corresponding to a sector count value when the sector is written on and read out from the buffer RAM 13, and it is executed by the memory controller 12, thereby, the processing burden on the system controller can be reduced.

公开(公告)号：JPH06162688A

公开(公告)日：1994-06-10

申请号：JP31589892

申请日：1992-10-31

Applicant: SONY CORP

Inventor： NAGASHIMA HIDEKI ,  MAEDA YASUAKI

IPC: G11B20/18

Abstract: PURPOSE:To prevent failure of sound and to reduce generation of abnormal sound by switching the number times of reading/writing in response to data quantity of a memory to be used as a ring buffer. CONSTITUTION:A system controller 7 switches the number times of settings of read retry on the basis of data quantity of reproduced data stored in a memory 14 as a reference. When the quantity of the data stored in the memory 14 is reduced, if the number of times of setting of the read retry is reduced, as the data quantity is large, read retry is sufficiently conducted to output correctly reproduced data. If the data quantity is small, it can be so set that reading operation cannot catch up with writing operation of the memory 14. Thus, failure of sound is prevented to reduce generation of abnormal sound.

公开(公告)号：JPH06150540A

公开(公告)日：1994-05-31

申请号：JP31578492

申请日：1992-10-31

Applicant: SONY CORP

Inventor： MAEDA YASUAKI ,  NAKAMURA KOSUKE

IPC: G11B20/10 ,  G11B27/10 ,  G11B27/28 ,  G11B27/34

Abstract: PURPOSE:To directly read out time information, etc., on data while being transferred at the optional point of time. CONSTITUTION:When the recording data is read out of a storage means 10, the address data corresponding to the recording data are read out simultaneously as well, and are fetched and held by a temporary storage part 8c, and the time information on the main data read out of the storage means based on the address data held in the temporary storage part is obtained. Thus, the correct time information is obtained simply and easily without operating the time information based on the data amount of the recording data stored in the storage means 10.

公开(公告)号：JPH0574063A

公开(公告)日：1993-03-26

申请号：JP26145291

申请日：1991-09-13

Applicant: SONY CORP

Inventor： MAEDA YASUAKI

IPC: G11B20/18

Abstract: PURPOSE:To obtain a correct data column without time deviation and a execute descramble with a correct corresponding relation. CONSTITUTION:The synchronizing signal of an input data supplied to a terminal 101 is detected by a synchronization detecting circuit 121, is interpolated by an interpolation control circuit 122 and sent to a CPU 124 through an interface circuit 123. By the CPU 124, whether the word number of the input data between the synchronizing signals is equal to the fixed word number specified preliminarily or not is discriminated, when different, by information from an error monitoring circuit 106, a readout from a RAM 113 is controlled so as to increase/decrease the word number of the input data at a part being an error position and descramble to the data of the above-mentioned fixed word number.

公开(公告)号：JPH0554517A

公开(公告)日：1993-03-05

申请号：JP23740391

申请日：1991-08-23

Applicant: SONY CORP

Inventor： OBATA HIDEO ,  MAEDA YASUAKI

IPC: G11B27/00 ,  G11B19/00 ,  G11B20/10 ,  G11B27/10

Abstract: PURPOSE:To effectively reproduce recording contents by recording TOC information on a disk before a battery is used up. CONSTITUTION:Bit compression digital data from an encoder 15 is magneto- optically recorded on a magneto-optical disk 2. The TOC information of recording contents is stored in a RAM 9. Whether a voltage of the battery 32, detected by a voltage detector 33 is dropped under a prescribed threshold or not is checked by a system controller 8, and when the voltage is dropped, the TOC information in the RAM 9 is recorded to the magneto-optical disk, and then the recording operation is completed.

公开(公告)号：JPH04252469A

公开(公告)日：1992-09-08

申请号：JP2556591

申请日：1991-01-25

Applicant: SONY CORP

Inventor： MAEDA YASUAKI

IPC: G11B7/00 ,  G11B7/005 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B20/18

Abstract: PURPOSE:To obtain an accurate synchronizing signal for sector even when an error exists on a recording plane by taking OR by matching the timing of the detection output of a synchronous pattern of sector unit and that of the synchronous pattern of auxiliary information. CONSTITUTION:An EFM input signal is inputted to a decoder 10, and decoded main data and the detection output of a subcode synchronous pattern can be obtained. The main data is sent to a synchronous detection circuit 80, and the detection output BP of a block synchronous pattern can be obtained, and the detection output of the subcode synchronous pattern is sent to a delay circuit 40, and the timing with the output BP is matched, and it goes to the detection output SCP, and is supplied to an OR gate 50 with the output BP, and they are OR-ed, then, it is outputted as the synchronizing signal for sector. In such a way, it is possible to obtain the accurate synchronizing signal for sector even when a large flaw, dust, or PLL step-out exists on the recording plane of a medium.

公开(公告)号：JPH04229462A

公开(公告)日：1992-08-18

申请号：JP41467290

申请日：1990-12-27

Applicant: SONY CORP

Inventor： OBATA HIDEO ,  MAEDA YASUAKI

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B20/12

Abstract: PURPOSE:To realize recording by utilizing an unrecording area by continuously recording data after the data recorded in a file whose file number of contents information is the maximum value and updating and recording data information in the file at the same time. CONSTITUTION:In the case that the displayed file number is over the maximum number 99 which can be recorded in a TOC, the recording is continuously executed after the data which is recorded as the contents information and recorded in the file whose file number is the maximum value by a system control part 10. Besides, a RAM for a TOC 18, a file number display 27, an indicator 28 or the like are controlled by the controller part 10. Moreover, the information of data quantity in the file of the contents information is controlled by the controller part 10 so as to be updated and recorded according to the newly recorded data.

公开(公告)号：JPH04105273A

公开(公告)日：1992-04-07

申请号：JP22282490

申请日：1990-08-24

Applicant: SONY CORP

Inventor： MAEDA YASUAKI ,  ANDO AKIRA ,  NAGASHIMA HIDEKI

IPC: G11B11/105 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B19/04 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/034 ,  G11B27/36 ,  H04N7/24

Abstract: PURPOSE:To secure the continuity of recording data by prohibiting a recording operation by a return means when the abnormality of the recording operation by a recording means is detected by an abnormality detecting means, and returning the recording means from an abnormal state to a normal state. CONSTITUTION:Input digital data in which a continuous signal is time-base compressed is stored in a memory means 14 transiently, and the digital data read out from the memory means is made into a cluster at every constant sectors by a signal processing means 15, and interleave processing is applied between the clusters by attaching a sector for cluster connection longer than interleave length, and recording data read out in unit of cluster from the memory means 14 by a memory control means 7 is recorded on a disk shape recording medium 2 successively by controlling a recording position by a recording control means 6. Also, the recording operation is prohibited by the return control means 7 when the abnormality of the recording operation by the recording means 16 is detected by the abnormality detecting means 30, and also, such control to return the recording means 16 from the abnormal state to the normal state is performed. In such a way, the continuity of the recording data can be secured.

公开(公告)号：JPH04105271A

公开(公告)日：1992-04-07

申请号：JP22282190

申请日：1990-08-24

Applicant: SONY CORP

Inventor： MAEDA YASUAKI ,  ANDO AKIRA ,  OBATA HIDEO ,  NAGASHIMA HIDEKI ,  YOSHIDA TADAO ,  FUJIIE KAZUHIKO ,  FUJISAWA HIROTOSHI ,  TAKEGAWA HIROSHI

IPC: G11B20/12 ,  G11B7/013 ,  G11B20/00 ,  G11B20/10 ,  G11B27/00 ,  G11B27/10 ,  G11B27/30 ,  G11B27/34

Abstract: PURPOSE:To easily perform recording in unit of cluster by making digital data into a cluster at every constant sectors, providing a sector for cluster connection longer than interleave length when interleave processing is performed at the connection part of each cluster, and recording the data on a disk shape recording medium by applying interleave. CONSTITUTION:The digital data converted at an A/D converter 12 is stored transiently in a storage means 14, and the digital data from the storage means 14 is made into the cluster at every constant sectors, and the sector for cluster connection longer than the interleave length in the interleave processing is provided at the connection part of each cluster, and the interleave is applied at an encoder 15, and the data is recorded on the disk shape recording medium 2 by a recording means 16. Therefore, the influence of the interleave on neighboring clusters can be eliminated by recording the data including the sector for cluster connection. In such a way, the recording in unit of cluster can be easily performed.

公开(公告)号：JPH04105270A

公开(公告)日：1992-04-07

申请号：JP22136590

申请日：1990-08-24

Applicant: SONY CORP

Inventor： OBATA HIDEO ,  ANDO AKIRA ,  MAEDA YASUAKI ,  NAGASHIMA HIDEKI ,  YOSHIDA TADAO ,  FUJIIE KAZUHIKO

IPC: G11B20/10 ,  G11B19/02 ,  G11B20/12

Abstract: PURPOSE:To successively enable data to be recorded in spite of the turbulence of a servo system, etc., due to disturbance by sequentially reading out an input data at transfer speed faster than that of the input data when the amount of input data stored in a memory means exceeds prescribed amount, and securing a data write area over the prescribed amount. CONSTITUTION:The memory means 14 writes the input data inputted successively sequentially, and reads out written an input data at the transfer speed faster than that of the input data. A memory control means 7 reads successively out only the prescribed amount of recording data when the amount of input data stored in the memory means 14 exceeds the prescribed amount, and performs such control to secure write space over the prescribed amount of data on the memory means 14. A recording means 16 records the recording data read out from the memory means 14 to a recording medium, and a recording control means 6 performs the control of a recording position so as to record successively the recording data read out sequentially from the memory means 14 insuccessively on the recording track of the recording medium by the memory control means 7. In such a way, it is possible to record the data successively in spite of the turbulence, etc., of the servo system due to the disturbance.