公开(公告)号：US4933774A

公开(公告)日：1990-06-12

申请号：US235283

申请日：1988-08-23

Applicant: Masayoshi Ishimaru

Inventor： Masayoshi Ishimaru

IPC: H04N5/93 ,  H04N5/932 ,  H04N5/937

CPC classification number: H04N5/937 ,  H04N5/932

Abstract: A video signal reproducing apparatus includes a field memory for storing one field of a reproduced video signal, a signal separator for extracting a horizontal sync pulse signal and a vertical sync pulse signal from the reproduced video signal, and an address counter responsive to the horizontal sync pulse signal for addressing the field memory. The apparatus in addition includes a pseudo signal generator and a reset signal generator. The pseudo signal generator is for producing a pseudo vertical sync pulse signal delayed relative to the vertical sync pulse signal. The reset signal generator is connected to the vertical sync pulse separator and the pseudo signal generator for producing a reset signal to reset the address counter. The reset signal generator normally uses the vertical sync pulse signal to produce the reset signal, but uses the pseudo vertical sync pulse signal to produce the reset signal when a vertical sync pulse is not obtained from the vertical sync pulse separator.

Abstract translation: 视频信号再现装置包括用于存储再现视频信号的一场的场存储器，用于从再现的视频信号中提取水平同步脉冲信号和垂直同步脉冲信号的信号分离器，以及响应于水平同步的地址计数器 脉冲信号用于寻址场存储器。 该装置还包括伪信号发生器和复位信号发生器。 伪信号发生器用于产生相对于垂直同步脉冲信号延迟的伪垂直同步脉冲信号。 复位信号发生器连接到垂直同步脉冲分离器和伪信号发生器，用于产生复位信号以复位地址计数器。 复位信号发生器通常使用垂直同步脉冲信号产生复位信号，但是当没有从垂直同步脉冲分离器获得垂直同步脉冲时，使用伪垂直同步脉冲信号产生复位信号。

公开(公告)号：US4780769A

公开(公告)日：1988-10-25

申请号：US826026

申请日：1986-02-04

Applicant: Toshihiko Numakura ,  Keiji Kanouta ,  Masashi Mizuta ,  Masayoshi Ishimaru ,  Michio Nagai

Inventor： Toshihiko Numakura ,  Keiji Kanouta ,  Masashi Mizuta ,  Masayoshi Ishimaru ,  Michio Nagai

IPC: H04N5/919 ,  H04N9/797 ,  H04N9/80 ,  H04N9/88 ,  H04N9/89

CPC classification number: H04N5/919 ,  H04N9/7973

Abstract: A recording and reproducing apparatus wherein the video signal is time base expanded and separated into two channels before being recorded with a two headed recorder on two separate channels of a magnetic medium and wherein during reproduction the two channels from the magnetic medium are supplied to a time base corrector which supplies an output to a channel mixing and time base compressor which converts the two channels into a single output signal. A burst generator inserts burst signals into the two channels before they are recorded.

Abstract translation: 一种记录和再现装置，其中视频信号被时基扩展并分离成两个通道，然后在磁介质的两个独立通道上用两头记录器进行记录，并且其中在再现期间将来自磁介质的两个通道提供到一个时间 基本校正器，其将输出提供给将两个通道转换为单个输出信号的通道混合和时基压缩器。 突发发生器在记录之前将突发信号插入两个通道。

公开(公告)号：US5003399A

公开(公告)日：1991-03-26

申请号：US434815

申请日：1989-11-13

Applicant: Masayoshi Ishimaru ,  Koji Iwamoto ,  Satoshi Miyashita

Inventor： Masayoshi Ishimaru ,  Koji Iwamoto ,  Satoshi Miyashita

IPC: H04N5/232

CPC classification number: G03B17/14 ,  H04N5/23209 ,  G03B2217/18

Abstract: A video camera has a body with an imager therein for providing a video signal in response to the projection of a light image thereon by a selected exchangeable lens device removably mounted on the camera body, and first and second computers in the camera body and lens device, respectively, which are programmed so that, in an initial communication sequence therebetween after the selected lens device is mounted on the camera body, the second microcomputer transmits optical characteristic data for the respective lens device to the first microcomputer in response to a data transmission request signal from the latter, and further so that, in a control communication sequence which follows the initial communication sequence, the first microcomputer transmits a control signal to the second microcomputer on the basis of the received optical characteristic data and a controlled status signal supplied to the first microcomputer from the second microcomputer. Further, upon the mounting of the selected lens device on the camera body, the existence of adequate electrical connections therebetween is readily detected.