Segment sync recovery network for an HDTV receiver

Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal

Reexamination Certificate

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Details

C375S343000, C375S321000, C348S500000, C348S726000

Reexamination Certificate

active

06233295

ABSTRACT:

FIELD OF THE INVENTION
This invention concerns a receiver system for processing a high definition television signal, eg., of the VSB-modulated type proposed by the Grand Alliance in the United States.
BACKGROUND OF THE INVENTION
The recovery of data from modulated signals conveying digital information in symbol form usually requires three functions at a receiver: timing recovery for symbol synchronization, carrier recovery (frequency demodulation to baseband), and channel equalization. Timing recovery is a process by which a receiver clock (timebase) is synchronized to a transmitter clock. This permits a received signal to be sampled at optimum points in time to reduce slicing errors associated with decision-directed processing of received symbol values. Carrier recovery is a process by which a received RF signal, after being frequency down converted to a lower intermediate frequency passband (eg., near baseband), is frequency shifted to baseband to permit recovery of the modulating baseband information. Adaptive channel equalization is a process by which the effects of changing conditions and disturbances in the signal transmission channel are compensated for. This process typically employs filters that remove amplitude and phase distortions resulting from frequency dependent time variant characteristics of the transmission channel, to provide improved symbol decision capability.
SUMMARY OF THE INVENTION
In accordance with the principles of the present invention, a system for processing a received Vestigial Sideband (VSB) modulated signal containing high definition television information includes a segment sync detection network responsive to an abbreviated (1 −1) correlation reference pattern.


REFERENCES:
patent: 5548339 (1996-08-01), Kim
patent: 5877816 (1999-03-01), Kim
patent: 5886748 (1999-03-01), Lee
patent: 5955618 (1999-09-01), Kim
patent: 5959682 (1999-09-01), Kim et al.
patent: 6049361 (2000-04-01), Kim
patent: 6104435 (2000-08-01), Kim
patent: WO 96/42171 (1996-12-01), None
Wayne Bretl et al., Zenith Electronics, VSB Modem Subsystem Design for Grand Alliance Digital Television Receivers, IEEE Transactions on Consumer Electronics, vol. 41, No. 3, Aug. 1995, pp. 773-786.
Hyoungsoo Lim et al., Pohang University, Korea, Low-Complexity Receiver Algorithms for the Grand-Alliance VSB HDTV System, IEEE Transactions on Consumer Electronics, vol. 42, No. 3, Aug. 1996, pp. 640-650.
Kibum Kim et al., A Symbol Timing Recovery Using The Segment Sync Data for the Digital HDTV GA VSB systme, IEEE Trasaction on Consumer Electronics, vol. 42, No. 3, Aug. 1996, pp. 651-655.*
D. Gaschler et al. “Performance of VSB and QAM-concepts for Digital Terrestrial TV Transmission,” IEEE 1998, pp. 194-200.*
Hyoungsoo Lim et al., “Low-Complexity Receiver Algorithms for the Grand-Alliance VSB HDTV System,” IEEE Transaction on Consumer Electronics, vol. 42, No. 3, Aug. 1996, pp. 640-650.*
Kwonhue Choi et al., “Design and Implementation of a Grand-Alliance HDTV Receiver Prototype,” IEEE Transactions on Consumer Electronics, vol. 43, No. 3, Aug. 1997, pp. 755-760.*
Zhaoyang Zhang et al., “Implementation Scheme of VSB Modualtion for HDTV Terrestrial Broadcasting,” IEEE, 1997, pp. 67-70.*
Kibum Kim et al., “A Symbol Timing Recovery using the Segment Sync Data for the Digital HDTV GA VSB System,” IEEE, 1996, pp. 310-311.

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