AU620052B2 – Compatible edtv with non-linear amplitude companding
– Google Patents
AU620052B2 – Compatible edtv with non-linear amplitude companding
– Google Patents
Compatible edtv with non-linear amplitude companding
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Publication number
AU620052B2
AU620052B2
AU25306/88A
AU2530688A
AU620052B2
AU 620052 B2
AU620052 B2
AU 620052B2
AU 25306/88 A
AU25306/88 A
AU 25306/88A
AU 2530688 A
AU2530688 A
AU 2530688A
AU 620052 B2
AU620052 B2
AU 620052B2
Authority
AU
Australia
Prior art keywords
signal
information
component
image
television
Prior art date
1987-09-14
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU25306/88A
Other versions
AU2530688A
(en
Inventor
Jack Selig Fuhrer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1987-09-14
Filing date
1988-09-09
Publication date
1992-02-13
1987-09-14
Priority claimed from GB878721565A
external-priority
patent/GB8721565D0/en
1988-09-09
Application filed by General Electric Co
filed
Critical
General Electric Co
1988-09-09
Priority claimed from PCT/US1988/003015
external-priority
patent/WO1989002689A1/en
1989-04-17
Publication of AU2530688A
publication
Critical
patent/AU2530688A/en
1992-02-13
Application granted
granted
Critical
1992-02-13
Publication of AU620052B2
publication
Critical
patent/AU620052B2/en
2008-09-09
Anticipated expiration
legal-status
Critical
Status
Ceased
legal-status
Critical
Current
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Classifications
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
G06T9/00—Image coding
G06T9/004—Predictors, e.g. intraframe, interframe coding
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N11/00—Colour television systems
H04N11/24—High-definition television systems
H04N11/30—High-definition television systems with transmission of the extra information by means of quadrature modulation
Description
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I.
AU-AI-25306/88 PCT WORLD, llTELLEC AL PE ORIZ N INTERNATIONAL APPLICATION PUBLISHE UNDER THE PATENT COOPERATION TREATY (PCT) (51) International Patent Classification 4 (11) hnternational Publication Number: WO 89/ 02689 H04N 11/00, 7/00 Al (43) International Publication Date: 23 March 1989 (23.03.89) (21) International Application Number: PCT/US88/03015 (81) Designated States: AT, AT (European patent), AU, BE (European patent), BR, CH (European patent), DE, (22) International Filing Date: 9 September 1988 (09.09.88) DE (European patent), DK, FI, FR (European patent), GB, GB (European patent), HU, IT (European patent), JP, KR, LU (European patent), NL, NL (Eu- (31) Priority Application Numbers: 8721565 ropean patent), NO, SE, SE (European patent), SU.
139,339 (32) Priority Dates: 14 September 1987 (14,09.87) Published 29 December 1987 (29,12.87) With international search report.
Before the expiration of the time limit for amending the (33) Priority Countries: GB claims and to be republished in the event oj’the receipt US of amendments, (71) Applicant: GENERAL ELECTRIC COMPANY [US/ US]; CN 5312, Princeton, NJ 08540 (US), (72) Inventor: FUHRER, Jack, Selig 6 Douglas Drive, Princeton Junction, NJ 08550 198 A.O.J.P. 5 MAY 1989 (74) Agents: WHITACRE, Eugene, MN, et al., General Elec-
AUSTRALIAN
tric Company, CN 5312, Princeton, NJ 08540 AUSTRA1AN 17 APR 1989 PATENT OFFICE (54) Title: COMPATIBLE TELEVISION SYSTEM WITH COMPANDING OF AUXILIARY SIGNAL ENCODING
INFORMATION
(57) Abstract An NTSC compatible, single channel widescreen EDTV system encodes and decodes a teleOision signal comprising a main, standard format NTSC signal with auxliary low frequency side panel image inf eination compressed into a overscan region thereof: auxiliary high frequency sde, panel image information and auxiliary high frequency horizontal luminance information High frequency components and are subjected to non-linear amplitude companding (2410, 1412), with large amplitude compression at an encoder and inverse amplitude expansion (1326) at a decoder.
,I
WO 89/02689 PCT/US88/03015 COMPATIBLE TELEVISION SYSTEM WITH COMPANDING OF AUXILIARY SIGNAL ENCODING INFORMATION This invention concerns apparatus for companding non-standard television signal encoding information. In particular, this invention concerns such apparatus employed by a system for generating a widescreen television sigral which is compatible with a standard television signal receiver.
A conventional television receiver, such as a receiver in accordance with NTSC broadcast standards adopted in the United States and elsewhere, has a 4:3 aspect ratio (the ratio of the width to the height of a displayed image). Recently, there has been interest in using higher aspect ratios for television receiver systems, such as 2:1, 16:9 or 5:3, since such higher aspect ratios more nearly approximate or equal the aspect ratio of the human eye than does the 4:3 aspect ratio of a conventiona television receiver. Video information signals with a 5:3 aspect ratid have received particular attention since this ratio approximates that of motion picture film, and thus such signals can be transmitted and received without cropping the image information. However, widescreen television systems which simply transmit signals having an increased aspect ratio as compared to conventional systems are incompatible with conventional aspect ratio receivers.
This makes widespread adoption of widescreen systems difficult.
It is therefore desirable to have a widescreen system which is compatible with conventional television receivers. One such system is disclosed in a eepcnding U. S. patentappeica~- en of C. H. Strolle et al., Serial No. 078,5 0- titled «Compatible Widescreen Television _ssue d 8 Ma
