公开(公告)号：JPS5665310A

公开(公告)日：1981-06-03

申请号：JP14167479

申请日：1979-10-31

Applicant: SONY CORP

Inventor： ODAKA KENTAROU

IPC: H04L1/00 ,  G11B5/09 ,  G11B20/18 ,  H03M13/00

Abstract: PURPOSE:To prevent the generation of a click noise securely by securing error correction and interpolation by holding previously an error detection result in the state showing that pulse-code-modulated PCM data has an error. CONSTITUTION:Through reading circuit 40, PCM data are read out of memory 10 with error detection results added to headers of respective words and corrections and interpolation are performed by correcting-interpolating circuit 50. At the same time, 1 showing that an error is occurring is previously added as the error detection result to the other output of circuit 40. In this constitution, when any error is not detected by error detecting circuit 20 owing to the disorder in synchronism among frames, etc., 1 showing that the error is occurring is read out of memory 10 as the error detection result and correcting-interpolating circuit 50 decides the occurrence of the error and then performs correction and interpolation. Thus, correction and interpolation are performed securely and the generation of a click noise can be prevented securely.

公开(公告)号：JPS55120250A

公开(公告)日：1980-09-16

申请号：JP2711079

申请日：1979-03-08

Applicant: SONY CORP

Inventor： ODAKA KENTAROU ,  DOI TOSHITADA

IPC: G11B20/12 ,  G11B20/18 ,  H03M13/27 ,  H04B14/04 ,  H04L1/00

Abstract: PURPOSE:To improve error correction efficiency by enabling error detection for every word in one unit interval during transmission by interleaving a PCM signal and error correction code in terms of time and then by adding an error detection code. CONSTITUTION:Sequences SL and SR of PCM signals of stereo channels are distributed 2 into three sequences of PCM signals each, and one word extracted from each sequence is made by adder 3 into sequencc SP0 of parity signals. Repective signals sequences are delayed 23a to 23f as long as fixed and interleaved in terms of time and while CRC coder 5 forms sequence SQ0 of check signals, they are delayed 24a to 24f and interleaved. Then, the PCM signal sequence, parity signal sequence and check signal sequence are mixed 6 and transmitted as a signal sequence of one channel.

公开(公告)号：JPS5556744A

公开(公告)日：1980-04-25

申请号：JP13016178

申请日：1978-10-23

Applicant: SONY CORP

Inventor： DOI TOSHITADA ,  ODAKA KENTAROU

IPC: H04J99/00 ,  G11B20/12 ,  G11B20/18 ,  H03M13/27 ,  H04B14/04 ,  H04L1/00

Abstract: PURPOSE:To realize the PCM signal transmission with a high error correction capacity by transmitting the interleaved PCM signal plus the error detection code added with every unit of the 1st and 2nd parity signals. CONSTITUTION:Every word of the PCM signal series of each channel is supplied to adder 19 of mode 2 to form 1st parity signal series SP. At the same time, every word is the PCM signal series of each channel is given to adjacent encoder 20 to form 2nd parity signal series SQ. Then series SP and SQ are supplied to delay circuits 22f and 22g to give the delay of different time to the PCM signals of plural channels and the both parity signals for interleaving. And the error correction code is added for transmission with every unit of the interleaved PCM signal and the both parity signals. In this way, the transmission becomes possible for the PCM signal featuring a high error correction capacity.

公开(公告)号：JPS60177484A

公开(公告)日：1985-09-11

申请号：JP3180784

申请日：1984-02-22

Applicant: SONY CORP

Inventor： ODAKA KENTAROU ,  OZAKI SHINYA ,  FUKAMI TADASHI

IPC: G11B27/02 ,  G11B27/032

Abstract: PURPOSE:To satisfactorily perform waveform processing at a signal joint part without using a buffer memory by recording a PCM signal from a segment whose interleaving is not completely connected with respect to an analog signal continued in terms of time. CONSTITUTION:A PCM signal A which is an analog signal such as sounds, etc., of right and left channels continued in terms of time is assigned to two track 4A and 4B, and interleaved and recorded in the two-segment complete connection of the magnetic tape. By deleting the next and subsequent segment tracks 4B and recording the new and same continuous signal B except a part corresponding to the first segment from this segment by using its track as the segment whose interleave is completely connected, there are new and old signals simultaneously at the joint part. Therefore, waveform processing for the joint such as cross- fade, etc., is satisfactorily performed without using a special buffer memory.

公开(公告)号：JPS607651A

公开(公告)日：1985-01-16

申请号：JP11678183

申请日：1983-06-28

Applicant: SONY CORP

Inventor： ODAKA KENTAROU ,  FUKAMI TADASHI ,  OZAKI NAOYA

IPC: G11B20/12 ,  G11B5/008 ,  G11B5/09 ,  G11B15/467 ,  G11B20/10

Abstract: PURPOSE:To make it unnecessary to change the speed of a tape the turning speed of a drum and an analog circuit even if sampling frequencies are different by selecting a frame frequency satisfying a specific condition. CONSTITUTION:A digital information recording device records digital signals having different sampling frequencies fs1-fsn. When it is defined that n1-nn are the numbers of data words, the field frequency F is selected so as to satisfy the equation. The operation frequency of each part is fixed by using the frequency F as a reference. If the sampling frequency is changed, the frequency F is fixed and the number of data words included in a 1/F period is set to nn. Thus, it can be made unnecessary to change the tape speed, the turning speed of the drum and the analog circuit even if the sampling frequency is different.

公开(公告)号：JPS59168961A

公开(公告)日：1984-09-22

申请号：JP4523183

申请日：1983-03-17

Applicant: Sony Corp

Inventor： ODAKA KENTAROU

IPC: G11B5/008 ,  G11B15/087 ,  G11B15/18

CPC classification number: G11B5/008 ,  G11B15/087 ,  G11B15/1858

Abstract: PURPOSE:To detect positioning well only with rotary heads in a recording and reproducing device of a PCM signal by making the frequency of a positioning pilot signal in a recording position, which should be positioned at a reproducing time, different from that in other parts at a recording time. CONSTITUTION:The device is set to the quick traversing or rewinding reproducing mode simultaneously with turning-on of a positioning switch. At this time, a pilot signal P1 or P2 taken out from a tape is supplied to a low pass filter 41 and is extracted and is supplied to a detecting circuit 42, and the change from the signal P1 to the signal P2 having a frequency f2 is detected. Consequently, a detection signal SD of the signal P2 is obtained from this detecting circuit 42 when the position of the signal P2 recorded between musics at a recording time is detected; and if the signal SD has a prescribed level or higher, a detection output signal is led out to an output terminal 44, and the tape is set to the normal reproducing mode from the quick traversing or rewinding mode in the position to be positioned by the output signal. Thus, positioning is performed only with rotary heads.

Abstract translation: 目的：通过将定位导频信号的频率设置在记录位置，通过将位于再现时间的定位导频信号的频率与其他部分的频率不同，才能通过旋转磁头在PCM信号的记录和再现装置中良好地检测定位 录音时间。 构成：在定位开关打开的同时，将设备设置为快速移动或倒带重放模式。 此时，从带取出的导频信号P1或P2被提供给低通滤波器41，并被提取并被提供给检测电路42，并且从信号P1到具有频率f2的信号P2的改变 被检测到。 因此，当检测到记录在记录时间的音乐之间的信号P2的位置时，从该检测电路42获得信号P2的检测信号SD; 并且如果信号SD具有规定的等级或更高级别，则检测输出信号被引出到输出端子44，并且在快速移动或重绕模式中将带设置为正常再现模式 输出信号。 因此，仅使用旋转头进行定位。

公开(公告)号：JPS59162606A

公开(公告)日：1984-09-13

申请号：JP3773283

申请日：1983-03-08

Applicant: Sony Corp

Inventor： OZAKI SHINYA ,  ODAKA KENTAROU

IPC: G11B20/12 ,  G11B20/10

CPC classification number: G11B20/10527

Abstract: PURPOSE:To make a smooth joint processing possible by converting an analog signal to a PCM signal and recording signals on each track so that signal components of the analog signal, which correspond to a prescribed time length, overlap signal components, which correspond to the prescribed time length, preceding and succeeding said signal components. CONSTITUTION:Rotary heads 1A and 1B are arranged at an interval of 180 deg., and a magnetic tape 2 is wound around a drum 3 in a range of, for example, 90 deg.. Consequently, a period when two rotary heads are not brought into contact with the tape 2 is generated, and in this period, redundant data is added at a recording time, and a correction processing or the like is performed at a reproducing time. As shown by Fig., signals corresponding to sections of a rotation angle of 10 deg. are written before and after a signal corresponding to a unit section of 180 deg. in RAMs 16 and 17, and they are recorded on every one track. Consequently, write control signals RWA and RWB of RAMs 16 and 17 overlap in a section of 20 deg. at the start and the end of their high-level periods (section of 200 deg.). Thus, a signal CP becomes high-level in a period corresponding to a section of 160 deg.-90 deg. in the beginning of each period, and a generation adding circuit 18 is made operated.

Abstract translation: 目的：通过将模拟信号转换为PCM信号并在每个磁道上记录信号，使对应于规定时间长度的模拟信号的信号分量与信号分量重叠，可以进行平滑的联合处理 时间长度，前后的所述信号分量。 构成：旋转头1A和1B以180度的间隔布置，并且磁带2以例如90度的范围缠绕在滚筒3上。因此，两个旋转头不是周期 产生与磁带2接触的状态，并且在此期间，在记录时间添加冗余数据，并且在再现时执行校正处理等。 如图所示，对应于旋转角度为10度的部分的信号， 在对应于180度的单位部分的信号之前和之后被写入。 在RAM16和17中，它们被记录在每一个轨道上。 因此，RAM16和17的写入控制信号RWA和RWB在20度的一部分中重叠。 在高级时期（200度）的开始和结束。 因此，信号CP在对应于160度-90度的部分的时间段内变为高电平。 在每个周期的开始，并且生成加法电路18被操作。

公开(公告)号：JPS59112411A

公开(公告)日：1984-06-28

申请号：JP22320682

申请日：1982-12-20

Applicant: Sony Corp

Inventor： ODAKA KENTAROU

IPC: H03M5/04 ,  G11B20/10 ,  G11B20/14

CPC classification number: G11B20/10527

Abstract: PURPOSE:To detect a synchronizing signal pattern by using a common detector, by selecting the synchronizing signal patterns of both modulating systems to a specified pattern, when reproducing a PCM signal recorded by switching the modulating system in accordance with a use application. CONSTITUTION:At the time of recording of a PCM signal, when the maximum number by which ''0'' is continued is n2 in a modulating system FM whose recording wavelength is short, a synchronizing signal pattern is good if ''0'' continues beyond n2+1. On the other hand, when the maximum number by which ''0'' is continued is m2 in a modulating system MFM whose recording wavelength is long, a synchronizing signal pattern is good if ''0'' continues beyond m2+1. When the minimum numbers by which ''0'' is continued are n1 and m1 in the systems FM, MFM, if K is determined by an expression I , the synchronizing signal pattern becomes an expression II and an expression III in the system FM and the system MFM, respectively, and by forming a synchronizing signal pattern to be detected, as an expression IV, a synchronizing signal can be detected by using a common detector.

Abstract translation: 目的：通过使用公共检测器来检测同步信号模式，通过将调制系统的同步信号模式选择为指定模式，当根据使用应用重现通过切换调制系统记录的PCM信号时。 构成：在记录PCM信号时，当记录波长较短的调制系统FM中持续“0”的最大数为n2时，如果为“0”，则同步信号模式良好 超越n2 + 1。 另一方面，当记录波长较长的调制系统MFM中连续“0”的最大数为m2时，如果“0”继续超过m2 + 1，则同步信号模式良好。 当连续进行“0”的最小数量是系统FM，MFM中的n1和m1，如果K由表达式I确定，则同步信号模式变为系统FM中的表达式II和表达式III， 并且通过形成要检测的同步信号模式，作为表达式IV，可以通过使用公共检测器来检测同步信号。

公开(公告)号：JPS58224415A

公开(公告)日：1983-12-26

申请号：JP10779582

申请日：1982-06-23

Applicant: Sony Corp

Inventor： FUKAMI TADASHI ,  ODAKA KENTAROU

IPC: H03M13/00 ,  G11B20/10 ,  G11B20/18

CPC classification number: G11B20/10527

Abstract: PURPOSE:To absorb the lag of a reproducing period which is due to jitter, by making reproducing window pulse width slightly wider than a tape winding angle period. CONSTITUTION:Reproducing window pulses PBW from an ROM 12 are applied to AND gates 50, 51, etc. and reproducing PCM signals are written in RAMs 101, 102 for odd and even fields, respectively. The width of the pulses PBW is slightly longer than the period that a tape is wound around a guide drum and reproduced by a rotary head. During the period that the window is closed, a reproducing PCM signal is corrected at its error by parity check. Since the window is slightly longer than the reproducing period, the reproducing lag due to jitter or the like is absorbed during the window period and the PCM signal can be reproduced without a trouble also at the generation of the jitter or the like.

Abstract translation: 目的：通过使再现窗口脉冲宽度比带缠绕角度周期稍宽，来吸收由于抖动引起的再现周期的滞后。 构成：将来自ROM 12的窗口脉冲PBW再现到AND门50,51等，再现PCM信号分别写入RAM101,102中用于奇数和偶数场。 脉冲PBW的宽度比带缠绕在导向鼓上并由旋转头再现的周期稍长。 在窗口关闭的时段期间，通过奇偶校验在其错误处校正再现PCM信号。 由于窗口稍长于再现时段，所以在窗口期间吸收由于抖动等引起的再现滞后，并且可以在产生抖动等的同时再现PCM信号。

公开(公告)号：JPS58187039A

公开(公告)日：1983-11-01

申请号：JP7078082

申请日：1982-04-27

Applicant: Sony Corp

Inventor： SAKO YOUICHIROU ,  KOJIMA YUUICHI ,  ODAKA KENTAROU

IPC: H03M13/00 ,  G11B3/00 ,  G11B7/00 ,  G11B20/12 ,  H04L1/00

CPC classification number: H04L1/004

Abstract: PURPOSE:To improve the error correcting ability, by assuming an error correction redundant code of data of an n-symbol Xm block aparted by D-block intervals as (i) and applying a part of a D'-block represented by m=D(n+i-1)+D' to the D-block. CONSTITUTION:Assuming the number of symbols (n) as 4, the number of blocks (m) as 23, the block D as 4, and the redundant code of error correction as 1, then substituting them into the formula m=D(n+i-1)+D', D=7-block is obtained. The symbol distance in error correction code series is applied to a part of the D' block in the range in which the remaining value D'' is not made smaller than the D-block. For example, the distance between symbol numbers W1 and W2, and between W3 and W4 is increased by one symbol each into 5 blocks and the remaining distance D'' is formed into 5 blocks.

Abstract translation: 目的：为了提高纠错能力，通过假设由D块间隔分开的n符号Xm块的数据的冗余码作为（i），并应用由m = D表示的D'块的一部分 （n + i-1）+ D'到D块。 构成：假设符号数（n）为4，块数（m）为23，块D为4，冗余码纠错为1，则将其代入公式m = D（n + i-1）+ D'，D = 7块。 错误校正码序列中的符号距离被施加到D'块的一部分，在剩余值D“不小于D块的范围内。 例如，符号号W1和W2之间以及W3和W4之间的距离增加一个符号分成5个块，剩下的距离D“形成5个块。