(11)EP 2 490 435 A3


(88)Date of publication A3:
04.09.2013 Bulletin 2013/36

(43)Date of publication A2:
22.08.2012 Bulletin 2012/34

(21)Application number: 12168176.1

(22)Date of filing:  13.05.2008
(51)International Patent Classification (IPC): 
H04N 5/14(2006.01)
H04N 5/205(2006.01)
H04N 5/213(2006.01)
H04N 5/46(2006.01)
H04N 5/60(2006.01)
H04N 5/44(2011.01)
H04N 5/20(2006.01)
H04N 5/21(2006.01)
H04N 5/455(2006.01)
H04N 5/52(2006.01)
H04N 5/62(2006.01)
(84)Designated Contracting States:

(30)Priority: 30.04.2008 US 112052

(62)Application number of the earlier application in accordance with Art. 76 EPC:
08103934.9 / 2117224

(71)Applicant: MediaTek, Inc
Hsin-Chu 300 (TW)

  • Liou, Ming-Luen
    235 Jhonghe City, Taipei County (TW)
  • Lin, Ray-Kuo
    241 Sanchong City, Taipei County (TW)
  • Chen, Yi-Fu
    116 Wunshan District, Taipei City (TW)

(74)Representative: 2K Patentanwälte Blasberg Kewitz & Reichel 
Partnerschaft Schumannstrasse 27
60325 Frankfurt am Main
60325 Frankfurt am Main (DE)


(54)Digitized analog TV signal processing system

(57) A digitized analog television signal processing system (200) is disclosed, comprising an analog-to-digital converter (202), a demodulation unit (203), a decoding unit (222), and a control unit (216). The analog-to-digital converter (202) samples a television signal comprising a video signal. The demodulation unit (203) demodulates the video signal. The decoding unit (222) decodes the demodulated video signal. The control unit (216) adjusts the demodulation unit (203) according to a signal quality indicator generated during and/or after the decoding of the decoding unit (222). The demodulation unit further comprises a carrier recovery unit configured to lock a video carrier of the video signal at an intermediate frequency, and the control unit can make a loop bandwidth of the carrier recovery unit controlled according to the signal quality indicator.

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