 Apparatus for indicating overcorrections, in electrical color correction apparatus |
| My copending application U.S. Ser. No. 770,192, filed Feb. 18, 1977 entitled "Apparatus for P... |
|
| Lightpen control circuit |
| The foregoing need is met in an illustrative embodiment of the invention wherein a lightpen control ... |
|
| Emulation attribute mapping for a color video display |
| What is claimed is: 1. A method of translating monochrome attributes to colors and color attributes ... |
|
| Generation of hard copy color photo reproductions from digitally created internegative |
| In accordance with the present invention, there is provided a hybrid photo-finishing system which ... |
|
| Edit decision list for identifying the pull down phase of a video signal |
| A conventional edit decision list (EDL) is a series of computer instructions for an edit ... |
|
| Replay bit stream searching |
| In an inventive arrangement, an apparatus reproduces a digitally encoded signal from a medium. The ... |
|
| Chroma signal phase correction circuitry to be used in a color video information playback system |
| An object of the present invention is therefore to provide a phase correction circuitry for a ... |
|
| Method of access to recording medium, and apparatus and method for processing information |
| An object of the present invention is to provide a method of access for a recording medium, which ... |
|
|
Chrominance signal reproducing apparatus for video tape recorder
| Details |
Inventors: Takase, Osamu; Masui, Hikaru; Itoh, Shigeyuki; Watatani, Yoshizumi;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Richardson; Robert L.
Assistant Examiner:
Attorney, Agent or Firm: Antonelli, Terry, Stout & Kraus
A magnetic recording and reproducing apparatus for eliminating the crosstalk component from an adjacent track of a tape of a VTR and obtaining a high picture quality. Chrominance signals in the base band which are produced by a low frequency conversion chroma signal are supplied to comb-shaped filters which are used in the magnetic recording and reproducing apparatus. The chrominance signals in the base band are obtained by generating carriers synchronized with a burst signal of the low frequency conversion chroma signal including the jitter component upon reproduction and by multiplying the carriers and the low frequency conversion chroma signal. A burst signal portion between the resultant chrominance signals in the base band is applied as a frequency control input signal to an oscillator as the carrier generating source, so that desired carriers are derived. Thus, the frequency fluctuation is eliminated from the converted chrominance signal in the base band and the high picture quality can be realized. |
|
DETAILED DESCRIPTION It is a main object of the present invention to eliminate the crosstalk components from the adjacent tracks which leak to a chroma signal on a recording track without requiring a high accuracy to a delay time of a delay line which is used in a comb-shaped filter and to prevent the deterioration of the picture quality of a magnetic recording and reproducing apparatus.
Another object of the invention is to realize the high picture quality in a magnetic recording and reproducing apparatus by suppressing the residual time base fluctuation component.
These objects are directly accomplished by using a chrominance signal in a base band which is produced from the low frequency conversion chroma signal and which is not used in the conventional techniques instead of using the low frequency conversion chrominance signal itself as a signal which is supplied to a comb-shaped filter consisting of a charge transfer device (hereinafter, also referred to as a CCD (Charge Coupled Device)) or the like.
However, the R-Y and B-Y components of the chrominance signal in the base band cause the carriers which are synchronized with a burst signal of the low frequency conversion chroma signal including the jitter component in the reproducing mode and are obtained by multiplying the carriers and the low frequency conversion chroma signal.
Therefore, the problems will be substantially solved if desired carriers are certainly obtained by applying the burst signal portion in the resultant chrominance signal in the base band as a frequency control input to an oscillator serving as a carrier generating source.
The R-Y and B-Y components of the chrominance signal in the base band exist in the band of about 0 to 500 kHz and this band is as low as about 1/7 to the ordinary chroma signal frequency of 3.
58 MHz.
+-.
500 kHz.
Even when the delay times which are necessary in the addition (subtraction) of the delay signal and the non-delay signal to obtain the comb-shaped characteristic are matched, the accuracy of 1/7 is enough
|
| Related patents |
|
|
Video signal recording and reproducing apparatus a frequency down-cinverted luminance signal into the vertical retrace line interval of a recording signal
Accordingly, it is an object of the present invention to provide a video signal recording and reproducing apparatus which can improve resolution by compressing a high ...
|
|
|
System for colorizing video with both pseudo-colors and selected colors
The present invention is directed to an improved system for colorization of monochrome video frames under operator control, the system facilitating colorization at ...
|
|
|
Recording method of still video apparatus
To achieve the object mentioned above, according to the basic concept of the present invention, if the image release operation is effected in the AV record mode during ...
|
|
|
Apparatus for detecting a cut in a video
What is claimed is: 1. A method for detecting a cut in a video, comprising the steps of: (a) acquiring video images from a source; (b) deriving from said video images a ...
|
|
|
Optical component containing a maximum of 200 wt.-ppm of chlorine
What is claimed is: 1. Optical component with a cylindrical core glass of synthetic quartz glass containing hydroxyl groups, a maximum 200 wt.-ppm of chlorine, and no ...
|
|
|
Television signal reception apparatus and method, and broadcast reception apparatus and method
To resolve the above described shortcomings, one objective of the present invention is to improve a user interface for a television signal reception apparatus having ...
|
|
|
Video recording and reproducing apparatus with crosstalk reduction
Referring first to FIGS. 1, 2A and 2B, the first embodiment of the color video signal recording and/or reproducing system according to the present invention will be ...
|
|
|
Process for thermoremanent duplication of magnetic recording master tape onto slave tape with reduced dimensional changes of slave tape
What is claimed is: 1. A process for thermoremanent duplication of magnetic signals of a magnetic recording master tape on a magnetic recording slave tape consisting of ...
|
|
|
Password that associates screen position information with sequentially entered characters
The present invention associates screen-position information with character information in a password, thereby increasing the password entropy provided by a given ...
|
|
|
Compact disk and high-speed search method thereof and recording method appropriate therefor
It is one object of the present invention to provide a search method which can search a program at high speed and thus decrease the overall playback time of a compact ...
|
|
|
TV Signal 
