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Co-channel interference canceler in simulcast receiver and method thereof

A technology of co-channel and receiver, applied in the field of co-channel interference canceller

Inactive Publication Date: 2004-06-02
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, if HDTV broadcasting starts, it must coexist with the existing NTSC, and the receiver must have a structure that allows people to watch HDTV or NTSC TV broadcasting as desired

Method used

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  • Co-channel interference canceler in simulcast receiver and method thereof
  • Co-channel interference canceler in simulcast receiver and method thereof
  • Co-channel interference canceler in simulcast receiver and method thereof

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Embodiment Construction

[0020] see figure 2 A simulcast receiver for receiving HDTV signals or existing analog broadcast (NTSC TV) signals is composed of a tuner 210, a first signal processor 220 for processing NTSC TV signals, and a second signal processor 220 for processing HDTV signals. Signal processor 230, and a display 280 constitute. In order to select an HDTV or NTSC TV signal and display the selected signal on the separate display 280, it must be determined whether the currently received signal is an HDTV signal or an NTSC TV signal. The determiner for performing this determination includes first and second detectors 240 and 250 and a determination signal generator 260 . The selector 270 selects the NTSC TV signal demodulated by the first signal processor 220 or the HDTV signal demodulated by the second signal processor 230 according to the determination signal.

[0021] The following will explain in detail figure 2 How the simulcast receiver works. Tuner 210 receives both HDTV and NTS...

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Abstract

A device for canceling co-channel interference and a method thereof are provided. The device, in a simulcast receiver for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal, includes a detector for detecting a synchronous signal from the analog broadcasting TV signal and outputting a detection signal, a co-channel interference rejection filter for removing co-channel interference from a first input signal including co-channel interference and outputting a second input signal, and a selector for selecting either the first or second input signal according to the detection signal. Therefore, the presence or absence of co-channel interference can be accurately determined regardless of channel environment.

Description

technical field [0001] The invention relates to a receiver, especially a reliable co-channel interference canceller in a simulcast receiver and a method thereof. Background technique [0002] Recently, tests of the GA (Grand Alliance) ATV (Advanced Television) system, which is a digital television transmission system standard that can replace NTSC (National Television System Committee), have been completed in the United States. GA-ATV (also known as GA-HDTV or GA-VSB) receiver adopts ATSC (Advanced Television System Committee) standard and is suitable for VSB (Vestigial Sideband) modulation method for digital transmission . [0003] The newer ATV signal is sent on a TV channel along with the normal analogue TV signal (NTSC), which is not currently used in the designated area (also known as the "taboo" channel). Therefore, the design of the GA-ATV receiver must be able to strongly suppress the co-channel interference of NTSC. exist figure 1 The structure of this GA-ATV re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/46H04N5/21H04N7/08H04N7/081
CPCH04N5/46H04N5/4401H04N5/211H04N5/21H04N21/426
Inventor 李命焕
Owner SAMSUNG ELECTRONICS CO LTD
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