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1. 发明公开

EP3008902A1 ENCODING AND DECODING METHODS FOR ADAPTING THE AVERAGE LUMINANCE OF HIGH DYNAMIC RANGE PICTURES AND CORRESPONDING ENCODER AND DECODER 审中-公开
标题翻译：具有高动态范围和此类编码器和解码器AVERAGE LUMINOSITY IMAGES的编码和解码方法适应
公开(公告)号：EP3008902A1
公开(公告)日：2016-04-20
申请号：EP14727518.4
申请日：2014-06-02
申请人： Thomson Licensing
发明人： TOUZE, David , OLIVIER, Yannick , THOREAU, Dominique , SERRE, Catherine
IPC分类号： H04N19/33
CPC分类号： H04N19/33 , H04N5/202 , H04N19/61 , H04N19/98
摘要： A method for encoding a sequence of high dynamic range pictures is disclosed. The method comprises for each picture of the sequence: obtaining a value representative of an average luminance of the high dynamic range picture; processing the high dynamic range picture so that the value representative of an average luminance of the processed picture is closer to a defined average luminance value than is the value representative of an average luminance of the high dynamic range picture; decomposing the processed high dynamic range picture in at least one first low dynamic range picture and one second low dynamic range picture of lower resolution representative of a global illumination of the scene; and encoding the first and second low dynamic range pictures and a data function of said value representative of an average luminance of said high dynamic range picture.

2. 发明公开

EP2186198A1 PLL LOOP ABLE TO RECOVER A SYNCHRONISATION CLOCK RHYTHM COMPRISING A TEMPORAL DISCONTINUITY 审中-公开
标题翻译： PLL环路的同步时钟节奏暂时的不连续恢复
公开(公告)号：EP2186198A1
公开(公告)日：2010-05-19
申请号：EP08803725.4
申请日：2008-09-05
申请人： Thomson Licensing
发明人： TAPIE, Thierry , DEFRANCE, Serge , SERRE, Catherine
IPC分类号： H03L7/093
CPC分类号： H03L7/093 , H03L7/10 , H04N21/4305
摘要： The present invention relates to the domain of video equipment. It relates to a phase-locked loop PLL1 able to recover the timing of a synchronisation signal PCRR comprising a temporal discontinuity of a maximum amplitude equal to PCR_Modulus, the loop PLL1 comprising: - a sample comparator CMP1 comparing the samples PCRr and the local samples of a synthesised signal PCR_loc1, - means GEN1 for producing the synthesised signal PCR_loc 1 from a corrected signal ERC, - a corrector COR1 receiving a comparison result ERR delivered by the comparison means CMP1 and delivering the corrected signal ERC. According to the invention, the comparison means CMP1 comprises the means to determine a difference in value between the local samples PCR_loc1 and the samples of the synchronisation signal and in that the comparison result ERR has a value that depends on the value and on the difference between the value and the value PCR_Modulus/2.

3. 发明公开

EP3671626A1 METHOD AND DEVICE FOR DETERMINING CONTROL PARAMETERS FOR MAPPING AN INPUT IMAGE WITH A HIGH DYNAMIC RANGE TO AN OUTPUT IMAGE WITH A LOWER DYNAMIC RANGE 审中-公开
公开(公告)号：EP3671626A1
公开(公告)日：2020-06-24
申请号：EP18213909.7
申请日：2018-12-19
申请人： Thomson Licensing
发明人： ANDRIVON, Pierre , TOUZE, David , SERRE, Catherine
IPC分类号： G06T5/00 , H04N5/232 , H04N19/186
摘要： According to at least one embodiment, there is provided a method for determining control parameters for mapping an input image (I LMax ) of a content, said image comprising pixels having luminance values represented with a high dynamic range bounded by a maximum luminance value (L Max ) to an image of the same content, said image comprising pixels having luminance values represented with a lower dynamic range, said method comprising :
- the computation (71) of an image characteristic parameter (IC LMax ) of the input image;
- the determination (74) of said control parameters (CP LMax ):
∘ from said image characteristic (IC LMax ), if said input image has a maximum luminance value (L Max ) less or equal than a maximum reference luminance value (L Ref );
∘ otherwise, from a converted image characteristic (cIC LMax ), said converted image characteristic being configured to set at least one of said control parameters of at the value that the determination step would have determined for a reference image (I LRef ) of the same content, said reference image having intensities represented with a high dynamic range bounded by said maximum reference luminance (L Ref ).

4. 发明公开

EP3477946A1 METHOD AND DEVICE FOR OBTAINING A SECOND IMAGE FROM A FIRST IMAGE WHEN THE DYNAMIC RANGE OF THE LUMINANCE OF SAID FIRST IMAGE IS GREATER THAN THE DYNAMIC RANGE OF THE LUMINANCE OF SAID SECOND IMAGE 审中-公开
公开(公告)号：EP3477946A1
公开(公告)日：2019-05-01
申请号：EP17306493.2
申请日：2017-10-31
申请人： THOMSON LICENSING
发明人： LE NAOUR, Robin , TOUZE, David , SERRE, Catherine
IPC分类号： H04N19/00
摘要： The present principles relates to a method and device for obtaining a second image from a first image when the dynamic range of the luminance of said first image is greater than the dynamic range of the luminance of said second image. The method comprises:
- deriving at least one component representative of the colors of said second image from said first image; and
- maximizing (step 12) at least one derived component (c2 and/or c3) according to a maximum value (MAX) depending on a linear-light luminance component (L) of the first image.

5. 发明授权

EP3074946B1 METHOD AND DEVICE FOR QUANTISING THE FLOATING VALUE OF A PIXEL IN AN IMAGE 有权转让
公开(公告)号：EP3074946B1
公开(公告)日：2018-10-17
申请号：EP14805228.5
申请日：2014-11-25
申请人： Thomson Licensing
发明人： BOITARD, Ronan , THOREAU, Dominique , BOUATOUCH, Kadi , COZOT, Remi , SERRE, Catherine
IPC分类号： G06T5/00 , H04N19/176 , H04N19/61 , H04N19/124 , H04N19/157
CPC分类号： H04N19/124 , G06T5/002 , G06T5/007 , G06T2207/10016 , G06T2207/20182 , G06T2207/20208 , H04N19/157 , H04N19/176 , H04N19/61
摘要： The invention relates to a method and device for quantising the floating value of a pixel of an image by rounding either to a lesser whole number, to a greater whole number, or to the whole number closest to this floating value. The method is characterised in that the selection of rounding this floating value is determined based on a test value.

6. 发明公开

EP3096520A1 A METHOD FOR ENCODING/DECODING A PICTURE BLOCK 有权转让
标题翻译：方法ZUR KODIERUNG DEKODIERUNG EINES BILDBLOCKS
公开(公告)号：EP3096520A1
公开(公告)日：2016-11-23
申请号：EP16169266.0
申请日：2016-05-12
申请人： Thomson Licensing
发明人： SERRE, Catherine , LASSERRE, Sebastien , LELEANNEC, Fabrice
IPC分类号： H04N19/50 , H04N19/61
CPC分类号： H04N19/186 , H04N19/176 , H04N19/182 , H04N19/34 , H04N19/50 , H04N19/61 , H04N19/98
摘要： The present disclosure generally relates to a method an device for encoding a picture block having a luminance component. The method is characterized in that the method comprises:
- obtaining (103, 301) a luminance residual block ( L r ) by subtracting a first representation ( L l , L lD ) of an average value of the luminance component calculated from said luminance component;
- obtaining (102) a second representation ( f ( L l ), f ( L l ) D ) of the average value by applying a transfer function to the average value ( L l ) of the luminance component in order to reduce the dynamic range of the average value;
- encoding a luminance block ( L e ) obtained by adding (105, 302) together the luminance residual block ( L r ) and the second representation ( f ( L l ), f ( L l ) D ) of the average value.
The disclosure further relates to a method and device of decoding a picture block.
摘要翻译：本公开一般涉及一种用于编码具有亮度分量的图像块的装置的方法。该方法的特征在于，该方法包括： - 通过从所述亮度分量计算出的亮度分量的平均值减去第一表示（L l，L lD）来获得（103,301）亮度残差块（L r） ; 通过将亮度分量的平均值（L l）应用传递函数来获得（102）平均值的第二表示（f（L 1），f（L 1）D），以便减小动态范围的平均值; 编码通过将平均值的亮度残差块（L r）和第二表示（f（L 1），f（L 1）D）相加（105,302））而获得的亮度块（L e）进行编码。本公开还涉及对图像块进行解码的方法和装置。

7. 发明公开

EP3074946A1 METHOD AND DEVICE FOR QUANTISING THE FLOATING VALUE OF A PIXEL IN AN IMAGE 有权转让
标题翻译： VERFAHREN UND VORRICHTUNG ZUR QUANTISIERUNG DES GLEITKOMMAWERTS EINES PIXELS IN EINEM BILD
公开(公告)号：EP3074946A1
公开(公告)日：2016-10-05
申请号：EP14805228.5
申请日：2014-11-25
申请人： Thomson Licensing
发明人： BOITARD, Ronan , THOREAU, Dominique , BOUATOUCH, Kadi , COZOT, Remi , SERRE, Catherine
IPC分类号： G06T5/00 , H04N19/85
CPC分类号： H04N19/124 , G06T5/002 , G06T5/007 , G06T2207/10016 , G06T2207/20182 , G06T2207/20208 , H04N19/157 , H04N19/176 , H04N19/61
摘要： The invention relates to a method and device for quantising the floating value of a pixel of an image by rounding either to a lesser whole number, to a greater whole number, or to the whole number closest to this floating value. The method is characterised in that the selection of rounding this floating value is determined based on a test value.
摘要翻译：本发明涉及一种用于通过将更小的整数，更大的整数或最接近该浮动值的整数四舍五入来量化图像的像素的浮动值的方法和装置。该方法的特征在于，基于测试值确定舍入该浮动值的选择。

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