KR20150092558A - Hybrid TV TUNER - Google Patents

Hybrid TV TUNER Download PDF

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Publication number
KR20150092558A
KR20150092558A KR1020140013072A KR20140013072A KR20150092558A KR 20150092558 A KR20150092558 A KR 20150092558A KR 1020140013072 A KR1020140013072 A KR 1020140013072A KR 20140013072 A KR20140013072 A KR 20140013072A KR 20150092558 A KR20150092558 A KR 20150092558A
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KR
South Korea
Prior art keywords
signal
analog
digital
frequency
tuner
Prior art date
Application number
KR1020140013072A
Other languages
Korean (ko)
Inventor
우장복
김주한
Original Assignee
(주)넥서스일렉트로닉스
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Priority to KR1020140013072A priority Critical patent/KR20150092558A/en
Publication of KR20150092558A publication Critical patent/KR20150092558A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • H04N21/42638—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners involving a hybrid front-end, e.g. analog and digital tuners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention relates to a hybrid TV tuner 100, and more particularly to a hybrid TV tuner 100 that receives an RF signal from an antenna and transmits the RF signal to an NTSC, a PAL, a SECAM, an ATSC, a QAM, a DVB- A frequency processing unit 101 for determining which frequency format is selected among the DTMBs; A distributor 102 for distributing the RF signal processed by the frequency processor 101 to a first RF signal and a second RF signal, respectively; A first RF circuit unit 103 for converting a first RF signal from the divider 102 into a first IF signal; A second RF circuit part (104) for converting the second RF signal from the distributor (101) into a second IF signal; A first analog demodulation unit 105 for demodulating the first IF signal from the first RF circuit unit 103 according to the analog TV demodulation method determined by the frequency processing unit 101; A second analog demodulation unit 106 for demodulating the second IF signal from the second RF circuit unit 104 according to the analog TV demodulation method determined by the frequency processing unit 101; The first RF circuit unit 103 decodes the first IF signal into a first TS signal according to the digital TV decoding scheme determined by the frequency processing unit 101, And a digital FEC decoder 107 for decoding the IF signal into a second TS signal according to the digital TV decoding method determined by the frequency processing unit 101.

Figure pat00001

Description

Hybrid TV tuner {Hybrid TV TUNER}

TECHNICAL FIELD [0001] The present invention relates to a hybrid TV tuner, and more particularly, to a hybrid TV tuner in which a single TV tuner is used for both NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / In addition, the present invention relates to a hybrid TV tuner implemented to support both PIP (Picture In Picture) of analog TV broadcasting and PIP of digital TV broadcasting in one package.

Television broadcasting standards include NTSC, PAL, SECAM, etc. for analog signals and ATSC, QAM, DVB-T2 / T / C2 / C, ISDB-T / C, DTMB etc. for digital signals. In general, conventional television tuners are designed to process signals corresponding to a specific standard among the above standards. In general, in order to implement a PIP, two identical tuners corresponding to a specific standard among the above standards must be designed do.

2 is a configuration diagram of an analog TV tuner that supports a conventional PIP.

2, an analog TV tuner 200 supporting a conventional PIP includes a distributor 201 for distributing an RF signal from an antenna ANT1 to first and second RF signals, A first RF circuit unit 202 for converting a first RF signal of the first RF signal into a first IF signal and selecting one channel among a plurality of channels included in the first RF signal, And a first analog demodulation unit 204 for demodulating the first IF signal of the first video signal VS1 and outputting the first video signal VS1 and the first audio signal AS1.

A second RF circuit unit 203 for converting a second RF signal from the divider 201 into a second IF signal and selecting one of a plurality of channels included in the second RF signal, And a second analog demodulation unit 205 for demodulating the second IF signal from the second RF circuit unit 203 and outputting the second video signal VS2 and the second audio signal AS2.

3 is a block diagram of a digital TV tuner supporting a conventional PIP.

Referring to FIG. 3, a digital TV tuner 300 supporting a conventional PIP includes a distributor 301 for distributing an RF signal from the antenna ANT2 to first and second RF signals, A first RF circuit unit 302 for converting a first RF signal of the first RF circuit unit 302 into a first IF signal and a second RF circuit unit 302 for converting a first IF signal from the first RF circuit unit 302 into a first TS And a digital FEC (Forward Error Correction) decoder 304.

A second RF circuit unit 303 for converting a second RF signal from the splitter 301 into a second IF signal; a second RF circuit unit 303 for converting the second IF signal from the second RF circuit unit 303 into a second TS signal And a second digital FEC decoder 305 for recovering the digital FEC.

However, there is a problem that the analog TV tuner supporting the conventional PIP shown in FIG. 2 and the digital TV tuner supporting the conventional PIP shown in FIG. 3 can not simultaneously receive analog broadcasting and digital broadcasting. Therefore, recently, TV tuners capable of simultaneously receiving an analog TV and a digital TV have been introduced. However, TV tuners capable of simultaneously receiving the analog TV and the digital TV have been implemented to process signals for a specific standard among the TV broadcasting standards Therefore, there is a problem that it is impossible to receive broadcast standards other than the specific standard.

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to solve the problems of the prior art described above and it is an object of the present invention to provide a system and method for broadcasting a broadcast of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / And a hybrid TV tuner in which a TV tuner supporting PIP function is implemented in one package.

In order to achieve the object of the present invention, a hybrid TV tuner according to the present invention receives an RF signal from an antenna and outputs the RF signal to an NTSC, a PAL, a SECAM, an ATSC, a QAM, a DVB-T2 / ISDB-T / C, DTMB; A distributor for distributing the RF signal processed by the frequency processor to a first RF signal and a second RF signal, respectively; A first RF circuit part for converting a first RF signal from the divider into a first IF signal; A second RF circuit portion for converting a second RF signal from the divider into a second IF signal; A first analog demodulator operative upon selection of an analog TV broadcast to demodulate a first IF signal from the first RF circuit section according to an analog TV demodulation method determined by the frequency processing section; A second analog demodulator operative upon selection of an analog TV broadcast to demodulate a second IF signal from the second RF circuit section according to an analog TV demodulation method determined by the frequency processing section; And decodes the first IF signal from the first RF circuit unit into a first TS signal according to the digital TV decoding method determined by the frequency processing unit, And a digital FEC decoder for decoding the IF signal into a second TS signal according to the digital TV decoding method determined by the frequency processor.

The hybrid TV tuner receives an RF signal from an antenna and determines whether the RF signal is in a frequency format of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / C2 / C, ISDB- And a frequency processing unit for determining the frequency.

And the first IF signal is set to a frequency different from the frequency of the second IF signal.

The first analog TV demodulation scheme is the same as the second analog TV demodulation scheme.

The first digital TV decoding method is the same as the second digital TV decoding method.

According to the present invention, a TV tuner capable of receiving broadcasting standards of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / C2 / C, ISDB- Is implemented in one package, and all the broadcasting standards can be received by one TV tuner, and analog PIP and digital PIP can be realized.

1 is a block diagram of a hybrid TV tuner according to the present invention;
2 is a block diagram of an analog TV tuner supporting a conventional PIP
3 is a block diagram of a conventional digital TV tuner supporting PIP

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

The present invention is not limited to the embodiments described, and the embodiments of the present invention are used to help understand the technical idea of the present invention. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

1 is a configuration diagram of a hybrid TV tuner according to the present invention.

Referring to FIG. 1, a hybrid TV tuner according to the present invention receives an RF signal RF from an antenna ANT, and outputs the RF signal RF to an NTSC, a PAL, a SECAM, an ATSC, a QAM, a DVB- (RF) signal processed by the frequency processor 101 is converted into a first RF signal and a second RF signal by the frequency processor 101, A first RF circuit unit 103 for converting a first RF signal from the splitter 102 into a first IF signal and a second RF circuit unit 103 for converting a second RF signal from the splitter 101 into a first IF signal, A second RF circuit unit 104 for converting the first IF signal received from the first RF circuit unit 103 into a second IF signal, A first analog demodulation unit 105 for demodulating according to a TV demodulation scheme, a second analog demodulation unit 105 for demodulating the first analog demodulation unit 105 according to a TV demodulation scheme, A second analog demodulation unit 106 for demodulating the IF signal in accordance with the analog TV demodulation method determined by the frequency processing unit 101, 1 IF signal to a first TS signal according to the digital TV decoding method determined by the frequency processing unit 101 and to judge a second IF signal from the second RF circuit unit 104 in the frequency processing unit 101 And a digital FEC decoder 107 for decoding the second TS signal according to the digital TV decoding method.

The hybrid TV tuner receives an RF signal from the antenna and determines whether the RF signal RF is in any of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / And a frequency processing unit 101 for determining whether the data is in the format.

The first IF signal IF1 may be set to the same frequency as the frequency of the second IF signal IF2 and the first IF signal IF1 may be set to the same frequency as that of the second IF signal IF2. The frequency can be set to a different frequency.

The first analog TV demodulation scheme may be the same as the second analog TV demodulation scheme. For example, the first and second analog TV demodulation schemes may be NTSC, PAL, SECAM, It can be a demodulation scheme according to one scheme.

The first digital TV decoding method may be an ATSC, a QAM, a DVB-T2 / T / C2 / C, ISDB-T / C, and DTMB.

Hereinafter, the functions and effects of the present invention will be described in detail with reference to the accompanying drawings.

1, a hybrid TV tuner 100 according to the present invention includes a frequency processor for receiving a RF signal RF from an antenna ANT and receiving the RF signal RF And determines whether the RF signal RF is in a frequency format of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / .

The distributor 102 divides the RF signal RF into a first RF signal RF1 and a second RF signal RF2 and supplies the first RF signal RF1 and the second RF signal RF2 to the first RF circuit unit 103 and the second RF circuit unit 104, Output.

The first RF circuit unit 103 converts the first RF signal RF1 from the divider 102 into a first IF signal IF1 and outputs the first RF signal RF1 to the first analog demodulation unit 105 and the digital FEC decoder 107).

The second RF circuit unit 104 converts the second RF signal RF2 from the divider 102 into a second IF signal IF2 and outputs the second RF signal RF2 to the second analog demodulator 106 and the digital FEC decoder 107).

The first IF signal IF1 may be set to the same frequency as the frequency of the second IF signal IF2 and the first IF signal IF1 may be set to the same frequency as that of the second IF signal IF2. The frequency can be set to a different frequency.

The first analog demodulation unit 105 operates when the TV broadcasting system determined by the frequency processing unit 101 is analog and outputs the first IF signal IF1 from the first RF circuit unit 103, According to the analog TV demodulation method determined by the frequency processor 101, and outputs the first video signal VS1 and the first audio signal AS1 generated in the demodulation process.

The second analog demodulation unit 106 operates when the TV broadcasting system determined by the frequency processing unit 101 is analog and outputs the second IF signal IF2 from the second RF circuit unit 104, According to the analog TV demodulation method determined by the frequency processing unit 101 and outputs the second video signal VS2 and the second audio signal AS2 generated in the demodulation process.

Thus, by using the output signals of the first analog demodulation unit 105 and the second analog demodulation unit 106, the analog PIP function can be realized.

In this case, the first analog TV demodulation scheme may be the same as the second analog TV demodulation scheme. For example, the first and second analog TV demodulation schemes may be NTSC scheme, PAL scheme, SECAM scheme, Or a demodulation scheme according to one of the schemes.

The digital FEC decoder 107 operates when the TV broadcast system determined by the frequency processor 101 is digital and outputs the first IF signal IF1 from the first RF circuit unit 103 Decodes the first TS signal TS1 according to the digital TV decoding method determined by the frequency processing unit 101 and outputs the second IF signal IF2 from the second RF circuit unit 104 to the frequency processing unit 101 And decodes the second TS signal TS2 according to the determined digital TV decoding method.

Thus, by using the output signals TS1 and TS2 of the digital FEC decoder 107, the digital PIP function can be realized.

The digital TV decoding method may be a decoding method according to one of ATSC, QAM, DVB-T2 / T / C2 / C, ISDB-T / C and DTMB.

In the present invention as described above, it is possible to receive broadcasting standards of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / Can be implemented in a single package and can receive all the broadcasting standards with one TV tuner. Analog PIP and digital PIP, and analog and digital screen can be simultaneously implemented on one TV screen. .

100: Hybrid TV tuner
101: Frequency processor
102, 201, 301: distributor
103, 202, 302: first RF circuit section
104, 203, and 303: a second RF circuit unit
105, 204: a first analog demodulator
106, 205: a second analog demodulator
107: Digital FEC decoder
304: a first digital FEC decoder
305: second digital FEC decoder
ANT, ANT1, ANT2: Antenna
RF: RF signal
RF1: first RF signal
RF2: second RF signal
IF1: first IF signal
IF2: second IF signal
TS1: first TS signal
TS2: second TS signal
VS1: first video signal
VS2: second video signal
AS1: first audio signal
AS2: second audio signal

Claims (1)

A frequency processor for receiving an RF signal from an antenna and determining whether the RF signal is a frequency format of NTSC, PAL, SECAM, ATSC, QAM, DVB-T2 / T / C2 / C, ISDB-T / C or DTMB;
A distributor for distributing the RF signal processed by the frequency processor to a first RF signal and a second RF signal, respectively;
A first RF circuit part for converting a first RF signal from the divider into a first IF signal;
A second RF circuit portion for converting a second RF signal from the divider into a second IF signal;
A first analog demodulator operable when the TV system determined by the frequency processor is analog and demodulating the first IF signal from the first RF circuit unit according to an analog TV demodulation method determined by the frequency processor;
A second analog demodulator that operates when the TV system determined by the frequency processor is analog and demodulates the second IF signal from the second RF circuit unit according to the analog TV demodulation method determined by the frequency processor;
And decodes the first IF signal from the first RF circuit unit into a first TS signal according to the digital TV decoding method determined by the frequency processing unit when the TV scheme determined by the frequency processing unit is digital, And a second FEC decoder for decoding the second IF signal from the second RF circuit section into a second TS signal according to the digital TV decoding method determined by the frequency processing section
Wherein the tuner is a tuner.
KR1020140013072A 2014-02-05 2014-02-05 Hybrid TV TUNER KR20150092558A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101616282B1 (en) * 2015-09-18 2016-04-28 (주)넥서스일렉트로닉스 Hybrid television tuner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101616282B1 (en) * 2015-09-18 2016-04-28 (주)넥서스일렉트로닉스 Hybrid television tuner

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