WO2009072015A2 - Récepteur et procédé de contrôle associé - Google Patents

Récepteur et procédé de contrôle associé Download PDF

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Publication number
WO2009072015A2
WO2009072015A2 PCT/IB2008/054336 IB2008054336W WO2009072015A2 WO 2009072015 A2 WO2009072015 A2 WO 2009072015A2 IB 2008054336 W IB2008054336 W IB 2008054336W WO 2009072015 A2 WO2009072015 A2 WO 2009072015A2
Authority
WO
WIPO (PCT)
Prior art keywords
value
vtotal
htotal
dclk
newhtotal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2008/054336
Other languages
English (en)
Other versions
WO2009072015A3 (fr
Inventor
Kaan Aydin
Koray Atalay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
Grundig Elektronik AS
Original Assignee
Arcelik AS
Grundig Elektronik AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcelik AS, Grundig Elektronik AS filed Critical Arcelik AS
Publication of WO2009072015A2 publication Critical patent/WO2009072015A2/fr
Publication of WO2009072015A3 publication Critical patent/WO2009072015A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0414—Vertical resolution change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0421—Horizontal resolution change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0464—Positioning
    • G09G2340/0471—Vertical positioning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0464—Positioning
    • G09G2340/0478—Horizontal positioning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/02—Graphics controller able to handle multiple formats, e.g. input or output formats

Definitions

  • the present invention relates to a receiver and a control method, which carry out automatic adjustment of components related to a video signal.
  • DCLK Dot Cock
  • HTotal which is one of the values used in calculating DCLK frequency, comprises synchronization information together with the horizontal pixel number. For that reason HTotal is greater than the horizontal pixel resolution of the panel. VTotal is also greater than the vertical pixel resolution of the panel, since it also comprises synchronization information together with the vertical pixel number.
  • F denotes how many times the image on the panel is refreshed in a second. This frequency can have different values such as 50 Hz in PAL systems and 60 Hz in NTSC systems.
  • HTotal, VTotal and DCLK variables are supplied by panel manufacturers.
  • the said values which are designated by the panel manufacturers also specify the DCLK range at which the device will operate in a normal manner.
  • maximum and minimum values of number of horizontal and vertical pixels (HTotalmax, HTotalmin, VTotalmax, VTotalmin) are adjusted such that minimum DCLK value (DCLKmin) and maximum DCLK value (DCLKmax) are maintained within a certain range. Accordingly the following conditions should be fulfilled:
  • DCLK values of panels with the same resolution may be different depending on the required synchronization in- formation or use of systems (PAL, NTSC) with different refresh frequencies (F).
  • DCLK value can exceed the specified range and this may cause occurrence of undesirable effects on the video image.
  • DCLK which is obtained when the panel is used with the said HTotalNorm and VTotalNorm values at 50 Hz refresh frequency (F)
  • DCLKMin when watching a broadcast from a PAL source, while HTotalNorm and VTotalNorm values designated according to the NTSC system, DCLK falls below the lowest required value and noise occurs in the image.
  • the Japanese patent document No. JP8160907 discloses a method and a device for automatic building of DCLK. According to this method, optimum delay is produced in the DCLK signal by using a microprocessor, analog-digital converters and delay circuits, and a proper video image is acquired.
  • DCLK value may be smaller than DCLKmin in PAL broadcasts, and greater than DCLKmax in NTSC broadcasts. Furthermore, in cases where frequency propagation range is changed via SSC (spread spectrum clocking) technique which is known as spreading the energy in a certain frequency range in the frequency domain, the probability of the DCLK value exceeding the foreseen range is more. Noise and similar problems are encountered in some devices since DCLK diverges from the predefined specifications of the panel as a result of these deviations.
  • SSC spread spectrum clocking
  • the objective of the present invention is to realize a receiver and a control method wherein DCLK value is maintained at a level suitable for the broadcast and formation of undesirable effects on the image are prevented.
  • Another objective of the present invention is to realize a receiver and a control method which do not require a separate calculation in each panel for DCLK, can calculate the DCLK value suitable for all panels by means of a single algorithm and thus facilitate adaptation of new panels.
  • a further objective of the invention is to realize a receiver and a control method which eliminate image distortions and incompatibilities originating from the fact that refresh frequencies are different in various broadcast systems (PAL, NTSC, etc.).
  • the inventive video signal receiver comprises a controller which enables that the horizontal and vertical pixel numbers (HTotal and VTotal) in the video signal are automatically adjusted according to the broadcast received.
  • the said controller changes the VTotal and/or HTotal in proportion to the amount of change (DCLKNorm/DCLK) in the DCLK value in order to bring DCLK to its normal value (DCLKNorm) or to its normal value range (DCLKmin-DCLKmax); makes DCLK equal to DCLKNorm if the New VTotal and NewHTotal values obtained as a result of the change are within the minimum and maximum limits determined for VTotal and HTotal; and if NewVTotal and NewHTotal values are not within the said limits, pulls these values within the limits and brings DCLK to the normal value range (DCLKmin-DCLKmax) and thus minimizes the image distortion.
  • DCLK range DCLKmin-DCLKmax
  • DCLKNorm DCLK value
  • DCLKNorm the most suitable DCLK value
  • HTotal horizontal total pixel number
  • VTotal vertical total pixel number
  • the required adjustments are performed on the HTotal and/or VTotal pixel numbers in order to bring this signal value to its normal level (DCLKNorm) or to the normal value range (DCLKmin-DCLKmax).
  • the video signal receiver calculates a new value for the horizontal pixel number (HTotal) and uses maximum (HTotalmax) and minimum (HTotalmin) values of the horizontal pixel number as the maximum and minimum values of the pixel number.
  • the video signal receiver calculates a new value for the vertical pixel number (VTotal) and uses maximum (VTotalmax) and minimum (VTotalmin) values of the vertical pixel number as the maximum and minimum values of the pixel number.
  • VTotal VTotal
  • the video signal receiver calculates a new value (NewHTotal and NewVTotal) for each of these pixel numbers, and uses the maximum (HTotalmax) and minimum (HTotalmin) values of horizontal pixel number for the maximum and minimum values of horizontal pixel number and the maximum (VTotalmax) and minimum (VTotalmin) values of vertical pixel number for the maximum and minimum values of vertical pixel number.
  • Figure 1 is the schematic view of the inventive receiver.
  • Figure 2 is the flowchart of an embodiment of the inventive method.
  • Figure 3 is the flowchart of another embodiment of the inventive method.
  • Figure 4 is the flowchart of a further embodiment of the inventive method.
  • the inventive video signal receiver (1) comprises a controller (2) which realizes automatic adjustment of the horizontal and vertical pixel numbers (HTotal and VTotal) in the video signal according to the broadcast received ( Figure 1).
  • the controller (2) by using the HTotal, VTotal and DCLK minimum, normal and maximum values determined by the panel manufacturer during the production process, adjusts the HTotal or VTotal value used during operation of the receiver so as to prevent DCLK from exceeding its normal value and performs adaptation of different panels to the receiver automatically.
  • Normal value of HTotal is defined as HTotalNorm, normal value of VTotal as VTotalNorm, and normal value of DCLK as DCLKNorm and the said values express the typical values that are determined by the manufacturer and may be used in the operation of the panel.
  • HTotal or VTotal values adjusts the HTotal and/or VTotal values so as to maintain DCLK signal at its normal value (DCLKNorm) or between its maximum and minimum values (DCLKmin-DCLKmax).
  • DCLKNorm normal value
  • DCLKmin-DCLKmax maximum and minimum values
  • NewHTotal new horizontal pixel number
  • New VTotal new pixel number
  • the method of controlling DCLK signal by automatic adjustment of the HTotal value in the video signal in the inventive receiver (1) comprises the steps ( Figure 2) of
  • HTotal is made equal to HTotalNorm and VTotal to VTotalNorm by the controller (2) (101), then HTotal, VTotal and F are multiplied to calculate the DCLK value (102).
  • the said value is compared with DCLKNorm (103). If DCLK is determined to comply with the panel specifications, the DCLK value obtained by multiplication of the existing HTotal, VTotal values and F is used as the NewDCLK value without making any changes (110).
  • DCLK value is not equal to DCLKNorm value, that is, if DCLK does not comply with the panel specifications, a new HTotal value is calculated in order to bring DCLK to a suitable (normal) value.
  • NewHTotal value is obtained by multiplying DCLKNorm and HTotal value and dividing it by DCLK (104). Then NewHTotal is compared with HTotalmin (105); if it is determined to be smaller than HTotalmin value, HTotal is made equal to HTotalmin (106). If NewHTotal is not smaller than HTotalmin, it is compared with HTotalmax in the next step (107). If NewHTotal is greater than HTotalmax value, HTotal is made equal to HTotalmax value (108).
  • HTotal is made equal to NewHTotal value (109).
  • HTotal value which is obtained at any of the steps (106, 108, 109) given above wherein HTotal value is changed, is multiplied by VTotal and F values whereby the NewDCLK that will be used by the receiver (1) is calculated (110).
  • NewHTotal HTotalNorm x HTotal / DCLK
  • NewHTotal is smaller than HTotalmin (105); if it is smaller than HTotalmin, making it equal to HTotalmin (106) and checking whether or not NewHTotal is greater than HTotalmax (107), if it is greater than HTotalmax, making it equal to HTotalmax (108).
  • HTotalmin 105
  • HTotalmin if it is smaller than HTotalmin, making it equal to HTotalmin (106)
  • HTotalmax if it is smaller than HTotalmin (107), if it is greater than HTotalmax, making it equal to HTotalmax (108).
  • the steps described above for HTotal to obtain DCLKNorm value are performed on VTotal and the same result is achieved.
  • the method of controlling DCLK signal by automatic adjustment of the VTotal value in the video signal in the inventive receiver (1) comprises the steps ( Figure 3) of
  • HTotal is made equal to HTotalNorm and VTotal to VTotalNorm by the controller (2) (201), then HTotal, VTotal and F are multiplied to calculate the DCLK value (202).
  • the said value is compared with DCLKNorm (203). If DCLK is determined to comply with the panel specifications, the DCLK value obtained with multiplication of the existing HTotal, VTotal values and F is used as the NewDCLK value without making any changes (210).
  • DCLK value is not equal to DCLKNorm value, that is, if DCLK does not comply with the panel specifications, a new VTotal value is calculated in order to bring DCLK to a suitable (normal) value.
  • NewVTotal value is obtained by multiplying DCLKNorm and VTotal value and dividing it by DCLK (204). Then NewVTotal is compared with VTotalmin (205); if it is determined to be smaller than VTotalmin value, VTotal is made equal to VTotalmin (206). If NewVTotal is not smaller than VTotalmin, it is compared with VTotalmax in the next step (207). If NewVTotal is greater than VTotalmax value, VTotal is made equal to VTotalmax value (208).
  • VTotal is made equal to NewVTotal value (209).
  • VTotal value which is obtained at any of the steps (206, 208, 209) given above wherein VTotal value is changed, is multiplied by HTotal and F values whereby the NewDCLK that will be used by the receiver (1) is calculated (210).
  • NewVTotal VTotalNorm x VTotal / DCLK
  • NewVTotal is smaller than VTotalmin (205); if it is smaller than VTotalmin, making it equal to VTotalmin (206) and checking whether or not NewVTotal is greater than VTotalmax (207), if it is greater than VTotalmax, making it equal to VTotalmax (208).
  • VTotalmin if it is smaller than VTotalmin, making it equal to VTotalmin (206)
  • VTotalmax if it is greater than VTotalmax, making it equal to VTotalmax (208).
  • both HTotal and VTotal values in the video signal are adjusted automatically and DCLK value is brought to normal DCLK value (DCLKNorm).
  • the method in the said embodiment of the invention comprises the steps ( Figure 2) of [81] - Calculating DCLK value by multiplying HTotal, VTotal and F (301),
  • HTotalmin value and calculating the NewVTotal value by multiplying DCLKNorm and VTotal value and dividing it by DCLK (305). [87] - If the NewHTotal is not smaller than HTotalmin value, comparing the NewHTotal with the maximum HTotal value (HTotalmax) (306), [88] - If the NewHTotal is greater than HTotalmax value, making HTotal equal to
  • HTotalmax value and calculating the NewVTotal value by multiplying DCLKNorm and VTotal value and dividing it by DCLK (307). [89] - If the NewHTotal is not greater than HTotalmax value, making HTotal equal to
  • VTotalmin value (310), [92] - If the NewVTotal is not smaller than VTotalmin value, comparing the NewVTotal with the maximum VTotal value (VTotalmax) (311), [93] - If the NewVTotal is greater than VTotalmax value, making VTotal equal to
  • NewVTotal is obtained by multiplying DCLKNorm and VTotal value and dividing it by DCLK (305). If NewHTotal is not smaller than HTotalmin, it is compared with HTotalmax in the next step (306). If NewHTotal is greater than HTotalmax value, HTotal is made equal to HTotalmax value (308), and NewVTotal value is calculated by multiplying DCLKNorm and VTotal value and dividing it by DCLK (307). It is used in calculating NewDCLK value obtained by multiplying HTotal, VTotal and F (314). If NewHTotal is not greater than HTotalmax value, HTotal is made equal to NewHTotal value (109).
  • NewVTotal is compared with VTotalmin (309); in the case that NewVTotal is smaller than VTotalmin, VTotal is made equal to VTotalmin and NewDLCK is calculated using the VTotal and HTotal values calculated until this step. If NewVTotal is not smaller than VTotalmin, it is compared with VTotalmax in the next step (311). If NewVTotal is greater than VTotalmax value, VTotal is made equal to VTotalmax value (308) and NewDLCK is calculated using the VTotal and HTotal values calculated until this step (314). If NewVTotal is not greater than VTotalmax value, VTotal is made equal to NewVTotal value (313) and NewDLCK is calculated using the VTotal and HTotal values calculated until this step (314).
  • the steps of comparing with the maximum and minimum values wherein VTotal and HTotal values are brought to normal operation range (HTotalmin- VTotalmax or VTotalmin- VTotalmax) by comparing them with their maximum and minimum values, can be arranged to have any of these comparisons performed first.
  • HTotal in the process of controlling the normal operation range an embodiment, where HTotal value range is controlled first, is described.
  • the said control process (comparing the pixel number with the maximum and minimum values) is carried out first for VTotal value and then for HTotal value.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

L'invention concerne un récepteur (1) et un procédé de contrôle associé. Selon l'invention, un signal DCLK (horloge pixels) est amené à des valeurs voulues par réglage automatique d'au moins un pixel du signal vidéo appartenant à un certain nombre de pixels horizontaux et verticaux (HTotal, VTotal), ce qui permet d'utiliser facilement des écrans de divers fabricants, présentant des résolutions variées.
PCT/IB2008/054336 2007-12-05 2008-10-21 Récepteur et procédé de contrôle associé Ceased WO2009072015A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200708440 2007-12-05
TR2007/08440 2007-12-05

Publications (2)

Publication Number Publication Date
WO2009072015A2 true WO2009072015A2 (fr) 2009-06-11
WO2009072015A3 WO2009072015A3 (fr) 2009-10-15

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PCT/IB2008/054336 Ceased WO2009072015A2 (fr) 2007-12-05 2008-10-21 Récepteur et procédé de contrôle associé

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6118486A (en) * 1997-09-26 2000-09-12 Sarnoff Corporation Synchronized multiple format video processing method and apparatus
JP2000152121A (ja) * 1998-11-13 2000-05-30 Sony Corp クロック生成回路、画像表示装置及び方法
JP2006047412A (ja) * 2004-07-30 2006-02-16 Sanyo Electric Co Ltd インターフェース装置及び同期調整方法
US8169467B2 (en) * 2006-03-29 2012-05-01 Nvidia Corporation System, method, and computer program product for increasing an LCD display vertical blanking interval

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