TH27820B - Network sync segment for high definition television sets. - Google Patents

Abstract

DC60 (23/11/41) receiver for processing the remaining sideband modulated signal that contains High-definition television information received terrestrial broadcasts and lead components that Includes an analog-to-digital input converter (19) for producing data streams that have been Sampled up at double the symbol rate earned. and a digital demodulator (22) which has a network of Reduce the data in the phase control loop. The segment sync monitor (24) uses an abbreviated correlation reference pattern to recover a sampling clock at twice the symbol rate for digital converters (19). associated with the lead component has been removed (26) from the resulting signal. It is demodulated before it is fed to the NTSC interference measurement network (30). The interference measurement network (30) consists of a responsive fine-tuning filter network. per data stream sampled at twice the symbol rate and shows a delay The samples are dimensioned to avoid latent coatings in the highly searched frequency bands. This increases the efficiency of the NTSC co-channel interference measurement. The receiver is for processing the remaining sideband modulated signal consisting of terrestrial broadcast high-definition television information and components. The lead contains an analog-to-digital input converter (19) for producing a data stream that is sampled at twice the received symbol rate. and digital demodulation (22), which has a data reduction network in a phase-controlled loop. Segment detector sync)(24)Use an abbreviated federal reference pattern to bring back a sampling clock that doubles the symbol rate for digital converters.(19)DC offsets associated with lead components have been removed.(26) ) from the pre-modulated signal being fed to the interference-sensing network. NTSC(30)Interference Measurement Network(30) consists of a fine-search filter network that responds to a sampled stream at twice the symbol rate. and demonstrated the dimensionality of the sample delay to avoid latent lamination in the fine-tuned frequency band, thereby increasing the efficiency of NTSC co-interference measurements.

Claims (5)

1. In a residual sidebar modulated signal processing (VSB) system containing high-fidelity video data that is represented by the VSB symbol group, the above data has a data frame format that It is made up of sequential data frames that contain a zinc field component that precedes many data segments with a corresponding sync segment component. A complete set that consists of A demoliter that responds to the above received signal to produce a demodulated signal. Way for Providing a correlation reference pattern between the syntax segments. And the data correlation device that responds to the aforementioned demodulated signals and to the reference pattern for the measurements of the aforementioned zinc segment components, whereby the correlation reference model The foregoing is used at less than four symbol ranges. 2.A system corresponding to claim 1, where the aforementioned syntax segment consists of the four symbol ranges and the aforementioned correlation reference format is used at the first two of the four symbols. The foregoing 3. A system corresponding to claim 1, where the aforementioned zinc segment component is unique, whereby the reference pattern 1 -1 -1 1 over the four symbols. The schemes 1 and -1 point to the relative amplitude of the aforementioned zinc segment components and the aforementioned correlation reference model as Figures 1 -1 used at the two ranges. The symbol at the beginning of the segment sync. 4. In the sidebar modulated signal processing system there are still (VSB) that contains high-fidelity video data that is represented by a VSB symbol group.The foregoing data contains a data frame format that is composed of sequential data frames containing a sync field component that precedes the segment. A large amount of data with a corresponding zinc segment component. The method consists of the following steps. Modulation of the above-mentioned VSB signal to produce the aforementioned demodulated signal and the modulated signal correlation using a correlation reference pattern. That is made during a sync segment, where the aforementioned correlation reference model uses less than four symbol ranges. 5. Method consistent with claim 4, where the foregoing correlation reference model is applied at the first two periods of the foregoing four symbols.