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Method and device for detecting synchronous signal

A technology of synchronizing signal and field synchronizing signal, applied in image communication, components of color TV, components of TV system, etc., can solve problems such as difficult detection

Inactive Publication Date: 2008-09-03
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, when a digital broadcast signal is received in the case of mobile communication, it is not easy to detect an 8-symbol segment sync signal

Method used

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  • Method and device for detecting synchronous signal
  • Method and device for detecting synchronous signal
  • Method and device for detecting synchronous signal

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Embodiment Construction

[0041] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0042] Figure 4 is a schematic diagram representing an embodiment of an apparatus for detecting a synchronization signal.

[0043] refer to figure 1 and figure 2 , the device for detecting the synchronization signal includes a correlator 50 and a counter 60 .

[0044] The correlator 50 calculates the correlation between the digital broadcast signal in and the predetermined reference pseudo-noise sequence (R_PN) provided in advance by the receiving end, determines that the position with the maximum correlation is the position of the pseudo-noise sequence (PN sequence), and outputs the field Synchronization detection signal (sync). The correlation is calculated by multiplying a predetermined reference pseudo-noise sequence (R_PN) by the digital broadcast signal in on a predetermined symbol unit basis and adding the multiplication result on a p...

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Abstract

The invention relates to a detecting device of synchronous signals applicable to receive segment synchronous signals, field synchronous signals and digital broadcasting signals of data; and detect the segment synchronous signal and the field synchronous signal from the signals. The invention comprises: a correlation calculator which calculates the correlation between the received digital broadcasting signal and the predetermined reference signal to detect the position of the field synchronous signal contained in the digital broadcasting signal; and a counter which counts the predetermined times at the detecting position of the field synchronous signal to estimate the count carry value as the segment synchronous signal producing point and output the segment synchronous detecting signal. Because the device detects the field synchronous signal and then uses the coefficient multiplier to estimate the segment synchronous signal, the hardware implementation can be simplified. Because the detection comprises the segment synchronous signals of a large number of code elements, and the counter is used to estimate the segment synchronous signals of a small amount of code elements, the synchronous signal can be detected conveniently. In addition, even though under the condition of mobile communication, the field and the segment synchronous signals can be detected easily.

Description

technical field [0001] The invention relates to a device for detecting synchronous signals in a digital broadcast signal receiver. In particular, the present invention relates to an apparatus for detecting a synchronizing signal which can easily detect a field synchronizing signal in the case of mobile communication and in an area where the signal is severely attenuated. Background technique [0002] With the unification and multimediaization of communication, computer and broadcasting, countries will digitize the existing analog system broadcasting. Developed countries such as the United States, Europe, and Japan have prepared digital broadcasting standardization systems, and the systems vary from country to country. [0003] The ATSC (Advanced Television Systems Alliance) system in the United States, the DVB-T (Digital Television Broadcasting in Terrestrial) system in Europe, and the ISDB-T (Integrated Services Digital Broadcasting in Terrestrial) system in Japan represen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/06H04N5/44H04N7/00H04N5/08
CPCH04N5/08H04N21/426
Inventor 郭征元
Owner SAMSUNG ELECTRONICS CO LTD
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