| US 7,557,862 B2 | ||
| Integrated circuit BTSC encoder | ||
| Amy Hundhausen, Laguna Beach, Calif. (US); Hosahalli Srinivas, Irvine, Calif. (US); Gopal Venkatesan, Aliso Viejo, Calif. (US); and Erik Berg, Laguna Beach, Calif. (US) | ||
| Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
| Filed on Feb. 23, 2004, as Appl. No. 10/784,863. | ||
| Claims priority of provisional application 60/495509, filed on Aug. 14, 2003. | ||
| Prior Publication US 2005/0039218 A1, Feb. 17, 2005 | ||
| Int. Cl. H04N 7/08 (2006.01); H04H 5/00 (2006.01) | ||
| U.S. Cl. 348—485 [381/3] | 18 Claims |
| 1. A single chip set-top box integrated circuit, comprising:
a digital BTSC encoder that is operable to encode first and second digital audio signals into a BTSC encoded signal, the first
and second digital audio signals having a bandwidth defined by the frequency content of the first and second digital signals;
a digital output modulator for receiving the BTSC encoded signal and generating a radio frequency (RF) modulated output signal
that is provided off chip; and
a BTSC decoder to receive a demodulated audio signal and to decode the demodulated audio signal for coupling to the digital
BTSC encoder;
wherein the digital BTSC encoder, BTSC decoder and digital output modulator are integrated on a same common substrate and
constructed as a single complementary metal oxide semiconductor (CMOS) integrated circuit chip and wherein data is exchanged
between the digital BTSC encoder and the BTSC decoder in a digital loopback mode to co-verify the data.
|