JP2004236004A5 - - Google Patents
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- JP2004236004A5 JP2004236004A5 JP2003022496A JP2003022496A JP2004236004A5 JP 2004236004 A5 JP2004236004 A5 JP 2004236004A5 JP 2003022496 A JP2003022496 A JP 2003022496A JP 2003022496 A JP2003022496 A JP 2003022496A JP 2004236004 A5 JP2004236004 A5 JP 2004236004A5
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Claims (15)
一本のラインに対応するアナログ信号たるライン信号から所定画素数の信号をサンプリングする標本化部と、
前記ライン信号の入力から前記サンプリング開始までのタイミングたる位相の調整量を最適化する最適化部と、
前記位相を前記調整量に応じて調整する調整部とを備え、
前記最適化部は、
前記位相の最小調整単位よりも大きい第１の間隔で設定された複数の第１次調整量に対して、前記サンプリングされた各ライン間のずれを定量的に計算する第１次計算部と、
前記第１次調整量の中から、前記ずれが極小となる少なくとも１つの調整量を選択する選択部と、
該選択された第１次調整量の周辺において、前記第１の間隔よりも小さい第２の間隔で設定された第２次調整量に対して、前記ずれを定量的に計算する第２次計算部と、
前記ずれの計算を行った全ての調整量の中から、前記ずれが極小となる調整量を最適値として前記調整部に設定する調整量設定部とを有する画像信号変換装置。An image signal converter for converting an analog signal representing an image composed of a plurality of adjacent lines into a digital signal,
A sampling unit that samples a signal of a predetermined number of pixels from a line signal that is an analog signal corresponding to one line;
An optimization unit that optimizes the amount of phase adjustment that is the timing from the input of the line signal to the start of sampling;
An adjustment unit that adjusts the phase according to the adjustment amount;
The optimization unit includes:
A primary calculation unit that quantitatively calculates a deviation between the sampled lines with respect to a plurality of primary adjustment amounts set at a first interval larger than the minimum adjustment unit of the phase;
A selection unit that selects at least one adjustment amount that minimizes the deviation from the first adjustment amount;
A secondary calculation for quantitatively calculating the deviation with respect to a secondary adjustment amount set at a second interval smaller than the first interval around the selected primary adjustment amount. And
An image signal conversion apparatus comprising: an adjustment amount setting unit that sets an adjustment amount at which the deviation is minimal among the all adjustment amounts for which the deviation has been calculated, as an optimal value.
前記第２の間隔が前記最小調整単位よりも大きい場合に、前記第２次調整量を前記第１次調整量として扱って前記第２次計算部を稼働させる収束制御部を備える画像信号変換装置。The image signal converter according to claim 1,
When the second interval is larger than the minimum adjustment unit, the image signal conversion apparatus includes a convergence control unit that operates the secondary calculation unit by treating the secondary adjustment amount as the primary adjustment amount. .
前記第２次調整量は、前記選択された１つの調整量のみを挟む所定範囲で設定される画像信号変換装置。The image signal converter according to claim 1,
The second-order adjustment amount is an image signal conversion device that is set within a predetermined range that sandwiches only one selected adjustment amount.
前記第２の間隔は、前記第１の間隔の１／２である画像信号変換装置。The image signal converter according to claim 1,
The image signal conversion device, wherein the second interval is ½ of the first interval.
前記第１の間隔は、少なくとも両端を除く範囲で均等に設定されている画像信号変換装置。The image signal converter according to claim 1,
The image signal conversion device wherein the first interval is set evenly in a range excluding at least both ends.
前記最適化部は、予め離散的に設定された所定個数の位相から前記調整量を選択する画像信号変換装置。The image signal converter according to claim 1,
The optimization unit is an image signal conversion device that selects the adjustment amount from a predetermined number of phases set discretely in advance.
前記所定個数の位相間をそれぞれ区分と呼ぶとき、前記第１次調整量の個数は、調整可能な全範囲に相当する区分数に対し、１を除く約数となっている画像信号変換装置。The image signal converter according to claim 6,
When the predetermined number of phases are called divisions, the number of the first adjustment amount is a divisor excluding 1 with respect to the division number corresponding to the entire adjustable range.
前記調整量記憶部は、前記第１次調整量の組を複数記憶し、
前記第１次計算部は、いずれかの組を選択して前記ずれを計算する画像信号変換装置。The image signal converter according to claim 6 ,
The adjustment amount storage unit stores a plurality of sets of the first adjustment amounts,
The primary calculation unit is an image signal conversion apparatus that selects any set and calculates the deviation.
前記調整の再試行を指示する再試行指示部を備え、
前記第１次計算部は、該再試行においては、直前の組とは異なる組を選択する画像信号変換装置。The image signal converter according to claim 8, wherein
A retry instruction unit for instructing the adjustment retry;
The primary calculation unit is an image signal conversion apparatus that selects a set different from the immediately preceding set in the retry.
前記記憶部は、所定の代表調整量と、該代表調整量からの相対的な偏差によって前記第１次調整量を記憶しており、
前記各組の第１次調整量は、前記代表調整量のみが相違しており、
該代表調整量の相違量は、前記第２の間隔より小さく設定されている画像信号変換装置。The image signal converter according to claim 8, wherein
The storage unit stores the primary adjustment amount by a predetermined representative adjustment amount and a relative deviation from the representative adjustment amount,
The primary adjustment amount of each set is different only in the representative adjustment amount,
The image signal conversion device, wherein the difference amount of the representative adjustment amount is set smaller than the second interval.
前記第１次調整量は、前記所定個数の位相の両端の調整量を含まない画像信号変換装置。The image signal converter according to claim 6,
The first-order adjustment amount is an image signal conversion device that does not include adjustment amounts at both ends of the predetermined number of phases.
一本のラインに対応するアナログ信号たるライン信号から所定画素数の信号をサンプリングする標本化部と、
前記ライン信号の入力から前記サンプリング開始までのタイミングたる位相を予め離散的に設定された３２個の既定調整量から最適化の値を選択する最適化部と、
前記位相を前記調整量に応じて調整する調整部とを備え、
前記最適化部は、
前記既定調整量の最小値または最小値よりも一つ大きい値を開始点として、２個以上８個以下の均等間隔で設定された複数の第１次調整量に対して、前記サンプリングされた各ライン間のずれを定量的に計算する第１次計算部と、
前記第１次調整量の中から、前記ずれが極小となる少なくとも１つの調整量を選択する選択部と、
該選択された第１次調整量の周辺において、前記第１の間隔よりも小さい第２の間隔で設定された第２次調整量に対して、前記ずれを定量的に計算する第２次計算部と、
前記ずれの計算を行った全ての調整量の中から、前記ずれが極小となる調整量を最適値として前記調整部に設定する調整量設定部とを有する画像信号変換装置。An image signal converter for converting an analog signal representing an image composed of a plurality of adjacent lines into a digital signal,
A sampling unit that samples a signal of a predetermined number of pixels from a line signal that is an analog signal corresponding to one line;
An optimization unit for selecting an optimization value from 32 predetermined adjustment amounts discretely set in advance as a phase from the input of the line signal to the start of sampling;
An adjustment unit that adjusts the phase according to the adjustment amount;
The optimization unit includes:
Starting from a minimum value of the predetermined adjustment amount or a value larger than the minimum value as a starting point, each of the sampled values for a plurality of primary adjustment amounts set at equal intervals of 2 to 8 A primary calculation unit for quantitatively calculating a shift between lines;
A selection unit that selects at least one adjustment amount that minimizes the deviation from the first adjustment amount;
A secondary calculation for quantitatively calculating the deviation with respect to a secondary adjustment amount set at a second interval smaller than the first interval around the selected primary adjustment amount. And
An image signal conversion apparatus comprising: an adjustment amount setting unit that sets an adjustment amount at which the deviation is minimal among the all adjustment amounts for which the deviation has been calculated, as an optimal value.
該画像を表すアナログ信号を入力する入力部と、
該アナログ信号をディジタル信号に変換する請求項１〜１２いずれか記載の画像信号変換装置と、
該標本化された画像を表示する表示部とを備える画像表示装置。An image display device for displaying an image,
An input unit for inputting an analog signal representing the image;
The image signal converter according to any one of claims 1 to 12, which converts the analog signal into a digital signal;
An image display device comprising: a display unit that displays the sampled image.
一本のラインに対応するアナログ信号たるライン信号から所定画素数の信号をサンプリングする工程と、
前記ライン信号の入力から前記サンプリング開始までのタイミングたる位相の調整量を最適化する工程と、
前記位相を前記調整量に応じて調整する工程とを備え、
前記最適化する工程は、
前記位相の最小調整単位よりも大きい第１の間隔で設定された複数の第１次調整量に対して、前記サンプリングされた各ライン間のずれを定量的に計算する工程と、
前記第１次調整量の中から、前記ずれが極小となる少なくとも１つの調整量を選択する工程と、
該選択された第１次調整量の周辺において、前記第１の間隔よりも小さい第２の間隔で設定された第２次調整量に対して、前記ずれを定量的に計算する工程と、
前記ずれの計算を行った全ての調整量の中から、前記ずれが極小となる調整量を最適値として設定する工程とを有する画像信号変換方法。An image signal conversion method for converting an analog signal representing an image composed of a plurality of adjacent lines into a digital signal,
Sampling a signal of a predetermined number of pixels from a line signal that is an analog signal corresponding to one line;
Optimizing the amount of phase adjustment from the input of the line signal to the start of sampling;
Adjusting the phase according to the adjustment amount,
The step of optimizing includes
Quantitatively calculating a deviation between the sampled lines with respect to a plurality of primary adjustment amounts set at a first interval larger than the minimum adjustment unit of the phase;
Selecting at least one adjustment amount that minimizes the deviation from the first adjustment amount;
A step of quantitatively calculating the deviation with respect to a secondary adjustment amount set at a second interval smaller than the first interval around the selected primary adjustment amount;
And a step of setting, as an optimum value, an adjustment amount that minimizes the deviation among all adjustment amounts for which the deviation has been calculated.
一本のラインに対応するアナログ信号たるライン信号から所定画素数の信号をサンプリングする標本化機構から、前記サンプリングしたデータを入力する機能と、
前記ライン信号の入力から前記サンプリング開始までのタイミングたる位相の調整量を最適化する機能と、
所定の信号を前記標本化機構に入力することで、前記位相を前記調整量に応じて調整する機能と、
前記最適化を行う機能の実現のための、
前記位相の最小調整単位よりも大きい第１の間隔で設定された複数の第１次調整量に対して、前記サンプリングされた各ライン間のずれを定量的に計算する機能と、
前記第１次調整量の中から、前記ずれが極小となる少なくとも１つの調整量を選択する機能と、
該選択された第１次調整量の周辺において、前記第１の間隔よりも小さい第２の間隔で設定された第２次調整量に対して、前記ずれを定量的に計算する機能と、
前記ずれの計算を行った全ての調整量の中から、前記ずれが極小となる調整量を最適値として設定する機能とを前記コンピュータに実現させるためのコンピュータプログラム。A computer program for causing a computer to convert an analog signal representing an image composed of a plurality of adjacent lines into a digital signal,
A function of inputting the sampled data from a sampling mechanism that samples a signal of a predetermined number of pixels from a line signal that is an analog signal corresponding to one line;
A function for optimizing the amount of phase adjustment from the input of the line signal to the start of sampling;
A function of adjusting the phase according to the adjustment amount by inputting a predetermined signal to the sampling mechanism;
For realizing the function to perform the optimization,
A function for quantitatively calculating a deviation between the sampled lines with respect to a plurality of primary adjustment amounts set at a first interval larger than the minimum adjustment unit of the phase;
A function of selecting at least one adjustment amount that minimizes the deviation from the first adjustment amount;
A function for quantitatively calculating the deviation with respect to a secondary adjustment amount set at a second interval smaller than the first interval around the selected primary adjustment amount;
A computer program for causing the computer to realize a function of setting, as an optimum value, an adjustment amount that minimizes the deviation among all adjustment amounts for which the deviation has been calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003022496A JP4003647B2 (en) | 2003-01-30 | 2003-01-30 | Image signal converter for phase adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003022496A JP4003647B2 (en) | 2003-01-30 | 2003-01-30 | Image signal converter for phase adjustment |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2004236004A JP2004236004A (en) | 2004-08-19 |
| JP2004236004A5 true JP2004236004A5 (en) | 2005-08-25 |
| JP4003647B2 JP4003647B2 (en) | 2007-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003022496A Expired - Fee Related JP4003647B2 (en) | 2003-01-30 | 2003-01-30 | Image signal converter for phase adjustment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4003647B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4182124B2 (en) | 2006-06-30 | 2008-11-19 | Ｎｅｃディスプレイソリューションズ株式会社 | Image display device, dot clock phase adjustment circuit, and clock phase adjustment method |
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2003
- 2003-01-30 JP JP2003022496A patent/JP4003647B2/en not_active Expired - Fee Related
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