Method and system for detecting signal modes in a broadcast...

Details Method and system for detecting signal modes in a broadcast... Method and system for detecting signal modes in a broadcast...

2003-08-15

2008-11-25

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

C381S002000, C381S010000, C381S012000, C381S022000, C348S481000, C348S483000, C348S485000, C348S738000

Reexamination Certificate

active

07457420

ABSTRACT:
A Japanese BTSC audio broadcast signal has three modes of transmission: mono, stereo, or dual mono. The control channel centering at 3.5 fH is one of the three channels in the J-BTSC signal, and contains information to indicate to the decoder which one of the three modes the audio transmission is in. The present invention uses a bandpass filter directly in the AM band, followed by envelope filtering and a decision circuit. Therefore, the need for AM demodulation and AM carrier detection is eliminated.

REFERENCES:
patent: 4368354 (1983-01-01), Furihata et al.
patent: 4399329 (1983-08-01), Wharton

Affiliated with

Also associated with

Rating

Method and system for detecting signal modes in a broadcast... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for detecting signal modes in a broadcast..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for detecting signal modes in a broadcast... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4028440