公开(公告)号：EP1673943A1

公开(公告)日：2006-06-28

申请号：EP04794940.9

申请日：2004-10-12

申请人： Thomson Licensing, S.A.

发明人： BOYCE, Jill, Mac Donald ,  GOMILA, Cristina ,  LLACH, Joan ,  TOURAPIS, Alexandros ,  COOPER, Jeffrey, Allen ,  YIN, Peng

IPC分类号： H04N7/26

CPC分类号： H04N5/262 ,  G06T5/002 ,  G06T5/10 ,  G06T2207/20021 ,  G06T2207/20052 ,  G06T2207/20204 ,  H04N19/117 ,  H04N19/136 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/85

摘要： The simulation of film grain in an image makes use of parameters contained in a Supplemental Enhancement Information (SEI) message that accompanies the image upon transmission. The SEI message specifies film grain simulation parameters such as the film simulation model, the blending mode, and color space.

公开(公告)号：EP1803303A2

公开(公告)日：2007-07-04

申请号：EP05813106.1

申请日：2005-10-17

申请人： Thomson Licensing S.A.

发明人： GOMILA, Cristina ,  LLACH, Joan ,  COOPER, Jeffrey, Allen

IPC分类号： H04N7/26

CPC分类号： G06T5/002 ,  G06T2207/10016 ,  G06T2207/20204 ,  H04N5/21 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/46 ,  H04N19/86

摘要： Reduction in the blockiness of a simulated film grain block can be achieved either by the use of adaptive downscaling or adaptive deblocking filtering to adjust the intensity of the pixels at the block edge in accordance with at least one film grain block parameter, such as film grain size, intensity and texture. Performing such adaptive downscaling or adaptive deblocking filtering achieves improved performance at lower computational cost by avoiding modification of film grain block pixels in lesser affected areas.

公开(公告)号：EP1690423A1

公开(公告)日：2006-08-16

申请号：EP04813479.5

申请日：2004-12-01

申请人： Thomson Licensing S.A.

发明人： COOPER, Jeffrey, Allen ,  BOYCE, Jill, MacDonald ,  TOURAPIS, Alexandros ,  GOMILA, Cristina ,  LLACH, Joan ,  YIN, Peng

IPC分类号： H04N7/26 ,  H04N5/262

摘要： Individual pixels in an image block undergo blending with film grain from a film grain block randomly selected from among a pool of previously established film grain blocks in accordance with a luma characteristic of the image block. Prior to blending, the selected film grain block undergoes deblocking by a deblocking filter ( 28 ). Following blending, a clipper clips the individual pixels prior to display. The pool of film grain blocks is created by scaling a set of film grain patterns in accordance with at least one parameter of a film grain information message that accompanies the image block.

摘要翻译： 根据图像块的亮度特性，图像块中的各个像素与从先前建立的胶片颗粒块的池（18）中随机选择的胶片颗粒块进行混合。 在混合之前，选定的胶片颗粒块通过去块滤波器（28）进行去块。 在混合之后，剪辑器（32）在显示之前剪切单个像素。 通过根据伴随图像块的胶片颗粒信息消息的至少一个参数缩放一组胶片颗粒图案来创建胶片颗粒块的池（18）。

公开(公告)号：EP1500207A2

公开(公告)日：2005-01-26

申请号：EP03721655.3

申请日：2003-04-14

申请人： Thomson Licensing S.A.

发明人： GOMILA, Cristina ,  BOYCE, Jill, MacDonald

IPC分类号： H04B1/66

摘要： An encoder, decoder, and corresponding method are disclosed for encoding pixel data as a plurality of block transform coefficients and decoding encoded block transform coefficients to provide reconstructed pixel data, the encoder and/or decoder includes a conditional deblocking filter for filtering only block transitions meeting pre-selected pixel brightness level criteria, where the conditional deblocking filter method includes receiving at least one first pixel adjacent to a block transition, providing a signal indicative of the brightness of the at least one first pixel, comparing the brightness signal with at least one of an upper brightness threshold and a lower brightness threshold, and conditionally filtering a plurality of adjacent pixels including the first pixel at the block transition in response to the brightness comparison.

摘要翻译： 公开了编码器（100），解码器（200,300）和对应方法（400），用于将像素数据编码为多个块变换系数并且解码编码块变换系数以提供重建的像素数据，编码器和/或解码器 包括用于仅过滤满足预选像素亮度等级标准的块过渡的条件去块滤波器（140,240,340），其中所述条件去块滤波器方法（400）包括接收（412）与块过渡相邻的至少一个第一像素 ，提供（414）指示所述至少一个第一像素的亮度的信号，将所述亮度信号与上亮度阈值和下亮度阈值中的至少一个进行比较（416,418），并且有条件地滤波（426） 响应于亮度比较，在块转变处包括包括第一像素的多个相邻像素。

公开(公告)号：EP1500197A2

公开(公告)日：2005-01-26

申请号：EP03718367.0

申请日：2003-04-14

申请人： Thomson Licensing S.A.

发明人： GOMILA, Cristina

IPC分类号： H03M1/22

摘要： An encoder, decoder, and corresponding method are disclosed for deblocking pixel data processed with block transformations, the encoder including a conditional deblocking filter for filtering only block transitions meeting chroma difference measure criteria; the decoder including a conditional deblocking filter for filtering only block transitions meeting chroma difference measure criteria; and the method for deblocking including receiving chroma level signals for at least two pixels disposed on opposite sides of a block transition, computing a distance measure between the chroma levels of the at least two pixels, comparing the distance measure with at least one threshold, and conditionally filtering adjacent pixels including the at least two pixels at the block transition in response to the comparison.

摘要翻译： 公开了一种编码器（100），解码器（200,300）以及对应的方法（400），用于对经块变换处理的像素数据进行解块，编码器包括用于仅滤波满足色度差测量标准的块变换的条件解块滤波器 ; 所述解码器包括用于仅滤波满足色度差测量标准的块转换的条件解块滤波器（240,340） 以及用于解块的方法包括：接收（412）用于布置在块转变的相对侧上的至少两个像素的色度级信号;计算（414）至少两个像素的色度级之间的距离度量;比较（416） 距离度量与至少一个阈值进行比较，并且响应于该比较，在块转变处有条件地滤波（422）包括至少两个像素的相邻像素。