-
1.发明授权Magnetic recording and/or reproducing system for television and audio signal 失效用于电视和音频信号的磁记录和/或再现系统
公开(公告)号：US4390906A
公开(公告)日：1983-06-28
申请号：US255348
申请日：1981-04-17
IPC分类号： G11B20/00 , H04N5/782 , H04N5/7826 , H04N5/928 , H04N5/78
CPC分类号： H04N5/928 , H04N5/782 , H04N5/78263
摘要： A two speed or multi-speed video tape recorder of the conventional helical scan type in which the audio signal is capable of being recorded as a time compressed signal at one end of each helical video scan, or alternatively, in conventional longitudinal fashion by means of a stationary magnetic head engaging one edge of the tape.At low tape transport speeds, improved bandwidth (and therefore sound fidelity) is obtained by use of the time compression technique; while at higher transport speeds, there are advantages in utilizing the stationary audio head.Circuitry is provided to automatically utilize the time compression technique at lower tape transport speeds and the stationary head longitudinal recording technique at higher tape transport speeds. A pilot or cue signal is recorded on the tape, to automatically control the reproduction circuitry so that both types of recording methods can be interchanged on the same magnetic tape, with the reproducing circuitry switching accordingly between the two modes, as required.
摘要翻译： 常规螺旋扫描类型的双速或多速录像机，其中音频信号能够在每个螺旋视频扫描的一端被记录为时间压缩信号，或者以常规的纵向方式通过 与磁带的一个边缘接合的固定磁头。 在低磁带传输速度下，通过使用时间压缩技术可以获得改进的带宽（因而声音保真度）; 而在较高的传输速度下，利用固定音频头具有优点。 提供电路以在较低的磁带传输速度下自动利用时间压缩技术，并以更高的磁带传输速度自动利用固定磁头纵向记录技术。 导频或提示信号被记录在磁带上，以便自动控制再现电路，使得两种类型的记录方法可以在同一磁带上互换，根据需要，再现电路在两种模式之间相应地切换。
-
2.发明授权Method for adjusting rotary head type magnetic video recording and reproducing apparatus 失效用于调节旋转磁头式磁视频记录和再现装置的方法
公开(公告)号：US4191978A
公开(公告)日：1980-03-04
申请号：US855707
申请日：1977-11-29
CPC分类号： H04N5/78263 , G11B5/588
摘要： A method for positioning a composite head comprising a control head and an audio head in a rotary head type magnetic video recording and reproducing apparatus at a precise spacing relative to a mounting position of the rotary head is disclosed. A video signal is recorded intermittently for each group of a predetermined number of video tracks on a reference tape and an audio signal is also recorded intermittently in association with the intermittently recorded video signal. The composite head is adjusted and positioned such that the intermittent relationship existing between a reproduced video signal and a reproduced audio signal is the same as the intermittent relationship existing between the video signal and audio signal during recording.
摘要翻译： 公开了一种将包括控制头和音频头的组合头相对于旋转头的安装位置以精确间隔定位在旋转磁头型磁性视频记录和再现装置中的方法。 对于参考磁带上的预定数量的视频轨道的每组，间歇地记录视频信号，并且音频信号也与断续记录的视频信号相关联地间歇地记录。 复合头被调整和定位成使得存在于再现视频信号和再现音频信号之间的间歇关系与记录期间视频信号和音频信号之间存在的间歇关系相同。
-
公开(公告)号：US4764822A
公开(公告)日：1988-08-16
申请号：US842174
申请日：1986-03-21
IPC分类号： G11B15/087 , G11B27/032 , G11B27/036 , G11B27/30 , G11B5/09 , G11B15/18
CPC分类号： G11B15/087 , G11B27/036 , G11B27/3018 , G11B2220/90 , G11B2220/913 , G11B27/032
摘要： The present invention relates to a cue signal recording method in which multi-audio tracks are formed by dividing a magnetic tape in a widthwise direction, and PCM data is recorded in a scanning track segment of an audio track of the multi-audio tracks by a helically scanning rotary head. A cue signal is then recorded in a remaining area of the scanning track segment except for the area recorded with the PCM data, such as in the after-recording-margin area or the track-guard area which is immediately after the PCM data area.
摘要翻译： 本发明涉及一种提示信号记录方法，其中通过在宽度方向上分割磁带形成多声道，并且PCM数据被记录在多声道的音轨的扫描轨道段中 螺旋扫描旋转头。 然后，将记录信号再记录在扫描轨道段的剩余区域中，除了记录在PCM数据的区域之外，例如在PCM数据区之后的后记录边缘区域或轨道保护区域中。
-
公开(公告)号：US4816930A
公开(公告)日：1989-03-28
申请号：US889926
申请日：1986-07-28
IPC分类号： G11B15/467 , G11B5/584
CPC分类号： G11B15/4678
摘要： A circuit for reproducing informaiton signals and four different tracking control pilot signals recorded on respective tracks on a magnetic tape and producing from the pilot signals a tracking error signal indicative of a relative positional deviation between each of a plurality of magnetic heads and each track of the tape. The circuit includes a balanced modulation circuit for successively multiplying reproductions of the pilot signals and a reference signal to produce a multiplication output signal having components corresponding to the respective pilot signals. Respective tuning circuits derive first and second signals from the multiplication output signal, having different frequency components and corresponding to different ones of the pilot signals. A level comparison circuit compares the first and second signals in level to produce a level-compared output signal whose value is indicative of the relative levels of the first and second signals, the level-compared output signal having respective portions corresponding to successive periods of reproducing signals on tracks on which different ones of the pilot signals are recorded. A further portion of this circuit time-divisionally extracts the values of levels of the level-compared output signal. A further comparator calculates the values of the differences between at least two of the extracted level values to produce the tracking error signal. The circuitry eliminates any variations in the tracking error signal which may be caused by any variations in mechanical height of the magnetic heads.
摘要翻译： 一种用于再现信息信号的电路和记录在磁带上的相应磁道上的四个不同的跟踪控制导频信号，并且从导频信号产生一个跟踪误差信号，该跟踪误差信号指示多个磁头中的每一个与每个磁头之间的相对位置偏差 胶带。 电路包括用于连续地乘以导频信号的再现和参考信号的平衡调制电路，以产生具有对应于各导频信号的分量的乘法输出信号。 相应的调谐电路从乘法输出信号中导出具有不同频率分量并对应于导频信号中的不同导频信号的第一和第二信号。 电平比较电路比较电平中的第一和第二信号以产生电平比较输出信号，其电平值表示第一和第二信号的相对电平，电平比较输出信号具有对应于连续的再现周期的各部分 在其上记录有不同导频信号的磁道上的信号。 该电路的另一部分分时提取电平比较输出信号的电平值。 另一比较器计算提取的电平值中的至少两个之间的差的值，以产生跟踪误差信号。 电路消除了可能由磁头的机械高度的任何变化引起的跟踪误差信号中的任何变化。
-
公开(公告)号：US4868692A
公开(公告)日：1989-09-19
申请号：US174399
申请日：1988-03-28
IPC分类号： G11B5/592 , G11B15/467 , G11B21/10
CPC分类号： G11B5/592 , G11B15/467 , G11B21/10
摘要： A tracking error signal forming circuit is disclosed, which circuit comprises means for obtaining a reproduction time difference between specified signals, each of which is contained in the reproduced signal reproduced by each of at least two heads having different azimuthal angles and mounted on an electro-mechanical converting element; reference value forming means for forming a reference value for the tracking control, operating means for calculating the difference between the reproduction time difference and the reference value or the sum thereof; displacement means for displacing forcedly the electro-mechanical converting element in the positive or negative direction; and maximum value detecting means for detecting the maximum value of at least one of the reproduced signals; the reference value forming means including means for calculating the difference between the reproduction time difference and the fixed reference value or the sum thereof at the point of time at which the maximum value of the reproduced signal is obtained by the maximum value detecting means.
-
6.发明授权Apparatus for recording and reproducing identification words on a helically scanned tape 失效用于在螺旋扫描的磁带上记录和再现识别词的装置
公开(公告)号：US4656536A
公开(公告)日：1987-04-07
申请号：US833583
申请日：1986-02-26
CPC分类号： G11B20/10527 , G11B15/1875 , G11B27/107 , G11B27/3027 , G11B27/3036 , G11B5/0086 , G11B2020/10592 , G11B2220/90
摘要： In a helical-scan tape recorder, a digital signal having a series of M identification words of N bits each is generated. One of the N-bit words is a discrimination word identifying a particular combination of the other N-bit words. The M words are organized into J groups of I words each (where J.times.I=M) and recorded with an information signal at spaced intervals within each of a series of sectors defined along each track of a recording tape so that the word groups are interleaved with the information signal and each of the recorded sub-blocks can be traced substantially simultaneously by a transducer head during a search mode. At least one of the word groups includes data bits identifying distinct, but mutually closely related items of information and discrimination bits which identify the data bits. During search mode, distribution bits can be detected with the data bits of the same word group to allow the closely related items of information to be displayed.
摘要翻译： 在螺旋扫描磁带录像机中，产生具有一系列具有N位的M个识别字的数字信号。 N位字中的一个是识别其他N位字的特定组合的鉴别字。 将M个词组成J个I个字组（其中JxI = M），并且以记录带的每个轨道定义的一系列扇区的每一个扇区内的间隔开的间隔记录信息信号，使得字组与 在搜索模式期间，信号信号和每个记录的子块可以由换能器头基本上同时跟踪。 所述单词组中的至少一个包括识别识别数据位的不同但相互密切相关的信息项和鉴别位的数据位。 在搜索模式下，可以用同一个字组的数据位检测分配位，以便显示密切相关的信息。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.02 秒)
