Improved-definition television

Improved-definition television (IDTV) or enhanced-quality television transmitters and receivers exceed the performance requirements of the NTSC standard,^[1] while remaining within the general parameters of NTSC emissions standards.^[2]

IDTV improvements were introduced in the late 1980s,^[2]^[3] and may be made at the television transmitter or receiver.^[4] Improvements include enhancements in encoding, digital filtering, scan interpolation,^[3] interlaced line scanning, and ghost cancellation.

IDTV improvements must allow the TV signal to be transmitted and received in the standard 4:3 aspect ratio.

The only relevant implementation of IDTV for NTSC-based broadcasts before the introduction of full-digital TV distribution (DTV) was the Japanese Clear-Vision. In European countries, PALplus and MAC had a similar role. The more commonly used term for advanced display technology before the advent of high-definition television (HDTV) was enhanced-definition television (EDTV), used for instance for plasma TV sets with a 16:9 aspect ratio in the early 2000s.

References

↑ Weik, Martin (2012-12-06) (in en). Communications Standard Dictionary. Springer Science & Business Media. pp. 439. ISBN 978-1-4613-0429-6. https://books.google.com/books?id=pVvSBwAAQBAJ.
↑ ^2.0 ^2.1 Barten, Gene (1989-01-30). "New Clarity Level Dazzles Viewers". The Bulletin: pp. B-3. https://books.google.com/books?id=ZEdTAAAAIBAJ&dq=%22Improved-definition+television%22&pg=PA5&article_id=5333,560776.
↑ ^3.0 ^3.1 Advokat, Stephen (1988-07-03). "´Smarter´ TV sets available". Beaver Country Times: pp. D-4. https://books.google.com/books?id=C7YiAAAAIBAJ&dq=%22Improved-definition+television%22&pg=PA25&article_id=4448,412000.
↑ Webre, Philip (1990) (in en). The Scope of the High-definition Television Market and Its Implications for Competitiveness. Congressional Budget Office. pp. 2. https://books.google.com/books?id=X3pH7rerqC0C.

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[1] Weik, Martin (2012-12-06) (in en). Communications Standard Dictionary. Springer Science & Business Media. pp. 439. ISBN 978-1-4613-0429-6. https://books.google.com/books?id=pVvSBwAAQBAJ.

[:0-2] 2.0 ^2.1 Barten, Gene (1989-01-30). "New Clarity Level Dazzles Viewers". The Bulletin: pp. B-3. https://books.google.com/books?id=ZEdTAAAAIBAJ&dq=%22Improved-definition+television%22&pg=PA5&article_id=5333,560776.

[:1-3] 3.0 ^3.1 Advokat, Stephen (1988-07-03). "´Smarter´ TV sets available". Beaver Country Times: pp. D-4. https://books.google.com/books?id=C7YiAAAAIBAJ&dq=%22Improved-definition+television%22&pg=PA25&article_id=4448,412000.

[4] Webre, Philip (1990) (in en). The Scope of the High-definition Television Market and Its Implications for Competitiveness. Congressional Budget Office. pp. 2. https://books.google.com/books?id=X3pH7rerqC0C.

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Improved-definition television

Topic: Engineering

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References