 |
|
|
|
|
|
 Title: |
US3872498:
COLOR INFORMATION TRANSLATING SYSTEMS
[ Derwent Title ]
|
| Country: |
US United States of America
|
| |
| Inventor: |
Pritchard, Dalton Harold; Princeton, NJ
|
| Assignee: |
RCA Corporation, New York, NY
other patents from RCA CORPORATION (466175) (approx. 7,929)
News, Profiles, Stocks and More about this company
|
| Published / Filed: |
1975-03-18
/ 1973-04-13
|
| Application Number: |
US1973000350777
|
| IPC Code: |
Advanced:
H04N 9/04;
H04N 9/78;
H04N 9/85;
Core:
H04N 9/82;
more...
IPC-7:
H04N 9/02;
|
| U.S. Class: |
Current:
348/609;
386/025;
386/E09.044;
Original:
358/021;
178/DIG.23;
358/004;
358/030;
|
| Field of Search: |
178/5.2 R,5.4 R,5.4 CD,DIG. 23
358/004,11,21,30,37
|
| Priority Number: |
| 1972-04-19 |
GB1972000018036 |
|
| Abstract: |
A color encoding format is disclosed wherein a chrominance signal in the form of a modulated subcarrier is buried in the midband of a wider band luminance signal. Comb filtering of the luminance signal midband prepares "troughs" in the luminance signal frequency spectrum. The chrominance signal is complementarily comb filtered to confine it to components falling in the vacated troughs of the luminance signal frequency spectrum. An illustrative use of this encoding format is in video disc recording. In subsequent processing of the encoded signals, as, for example, in playback of the video disc, the buried subcarrier chrominance signal may be separated from the midband luminance components by comb filtering, with substantial assurance of freedom from all crosstalk between the shared band components (including freedom from crosstalk by "diagonal" components). Systems (e.g., for recorder use) are shown for direct encoding into the buried subcarrier format, and for transcoding from NTSC format into buried subcarrier format. Systems (e.g., for player use) are also shown for transcoding from buried subcarrier format to NTSC format.
|
| Attorney, Agent or Firm: |
Whitacre, Eugene M. ;
Meagher, William H. ;
|
| Primary / Asst. Examiners: |
Richardson, Robert L.;
|
| INPADOC Legal Status: |
None
Family Legal Status Report
|
| Family: |
Show 45 known family members
|
First Claim:
Show all 25 claims |
1. In a color image signal translating system, the combination comprising:
- means for developing signals representative of only the chrominance of said color image and occupying only a given frequency band;
- means for developing signals representative of only the luminance of said color image and occupying a band of frequencies inclusive of said given frequency band as well as a band of frequencies lower than and adjacent to said given frequency band;
- means for processing the luminance representative signals developed by said luminance representative signal developing means to effect signal component removal at a plurality of spectral locations regularly spaced throughout said given frequency band while passing substantially all signal components thereof falling within said lower frequency band;
- comb filter means responsive to the chrominance representative signals developed by said chrominance representative signal developing means for substantially confining said chrominance representative signals to components at said plurality of regularly spaced spectral locations; and
- means for combining the outputs of said luminance representative signal processing means and said comb filter means to form a composite signal inclusive of luminance representative signal components falling within said lower frequency band and in which luminance representative signal components and chrominance representative signal components share said given frequency band in substantially non-overlapping, interleaved
|
| Background / Summary: |
Show background / summary
|
| Drawing Descriptions: |
Show drawing descriptions
|
| Description: |
Show description
|
| Forward References: |
Show 32 U.S. patent(s) that reference this one
|
