Noise reduction circuit for television multi-channel sound

Details Noise reduction circuit for television multi-channel sound Noise reduction circuit for television multi-channel sound

1985-07-31

1987-09-01

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358198, H04N 704

Patent

active

046912347

ABSTRACT:
A television receiver includes an audio signal processing arrangement for expanding a second audio program (SAP) signal compressed in accordance with the "dbx" system in a relatively simple manner. The signal processing arrangement includes a first filter for providing a first amount of deemphasis. A controllable gain amplifier has its input coupled to the filter and its gain controlled by a filtered signal representative of its input signal. A second filter at the amplifier output provides a second amount of deemphasis.

REFERENCES:
"The DBX Television Multichannel Sound Compander: Characterization" by L. B. Tyler, published by Electronic Industries Association, 12/83, pp. 22-56.
"TV Multichannel Sound--The BTSC System" by C. G. Eilers, IEEE Transactions on Consumer Electronics, 2/85, vol. CE-31, No. 1, pp. 1-7.
"A Companding System for Multichannel TV Sound" by Tyler et al., IEEE Transactions on Consumer Electronics, 11/84, vol. CE-30, No. 4, pp. 633-640.
"Handbook of Industrial Electronic Circuits", Markus et al., published by McGraw-Hill Book Company, Inc., New York, 1948, pp. 5-9.
"TV Multichannel Sound--The BTSC System" by C. G. Eilers, IEEE Transactions on Consumer Electronics, 8/84, vol. CE-30, No. 3, pp. 236-241.
"TV Multichannel Sound--Encoding and Transmission" by Lee et al., IEEE Transactions on Consumer Electronics, 8/84, vol. CE-30, No. 3, pp. 242-246.
"TV Multichannel Sound--Reception and Decoding" by Mycynek et al., IEEE Transactions on Consumer Electronics, 8/84, vol. CE-30, No. 3, pp. 247-250.

Affiliated with

Also associated with

Rating

Noise reduction circuit for television multi-channel sound does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Noise reduction circuit for television multi-channel sound, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise reduction circuit for television multi-channel sound will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1267812