H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/34
H04N 7/08 (2006.01) H04N 7/045 (2006.01) H04N 7/083 (2006.01) H04N 7/10 (2006.01) H04N 7/54 (2006.01)
Patent
CA 1254653
21 ABSTRACT: In a television transmitter equipment for a television transmission system having a time multiplexed signal in component form, the vision components are derived from a vision source (1), encoded in a MAC encoder (2) and the encoded vision signals are modulated in a frequency modulator (3) which also receives oscilla- tions from an oscillator (4). The modulated output of the frequency modulator (3) is applied through a multiplexer (5) to a transmitter (6) whose modulated carrier is applied to a dish aerial (7) for transmission to a satellite. The equipment contains a number of sources (8 to 15) of sound/data information which are separated into two groups, an 'A' group of sources (8 to 11) and a 'B' group of sources (12 to 15). Digital signals from the 'A' group sources are applied to an 'A' packet multiplexer (17) where the signals are assembled packet-by-packet into a given time area at a bit rate of 10.125 MHz. Correspond- ing signals from the 'B' group sources are applied to a 'B' packet multiplexer (18) where these signals are similarly assembled into a corresponding time area at the same bit rate. The outputs of the 'A' and 'B' packet multiplexers (17, 18) are applied to respective inputs of a further multiplexer (19) to produce within the time area bits derived from the two packet multiplexers. This data, the appropriate line sync words from a sync word generator (21) and data from a source (23) for lines 624 and 625 of each frame are assembled in a data assembler (20) to pro- duce the data burst containing the sound/data components or the time multiplexed signal. This is modulated in a 2-4 PSK modulator (22) and the modulated output applied to a further input of the multiplexer (5), The data burst of the signal produced may be readily separated into its two groups to produce a data burst at the lower bit rate from one group for the transmission of a time multiplexed tele- vision signal over a medium of narrow bandwidth such as a cable channel.
483308
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
LandOfFree
Television transmission system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Television transmission system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Television transmission system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1320346