Patent application number | Description | Published |
20080232476 | Method For Coding/Decoding Video Data - The present invention relates to coding of SNR enhancement layer data produced during video signal encoding. The present method determines order or blocks in a picture according to a probability table that is obtained from frequencies of locations where non-zero data exists, scans and codes data on each block to data stream as selecting blocks in the determined order, updates the probability table, re-determines order of blocks in the picture based on the updated probability table, and scans and codes data on each block to data stream just after location where the previous scanning is suspended as selecting blocks in the re-determined order. The present invention increases probability to provide a decoding side with more data that contributes to video quality improvement. | 09-25-2008 |
20080291997 | Method of Encoding and Decoding Video Signals - Disclosed herein is a method of encoding video signals. The method includes creating a bit stream of a first layer by encoding the video signals, and creating a bit stream of a second layer by encoding the video signals based on the first layer. When residual data, corresponding to an image difference, within the first layer, is up-sampled and used for the encoding of the second layer, the residual data is up-sampled for each block that is predicted based on motion compensation. | 11-27-2008 |
20080304566 | Method for Decoding Video Signal Encoded Through Inter-Layer Prediction - A method for decoding a video signal encoded through inter-layer prediction is provided. When encoded bitstreams of first and second layers are received and decoded into a video signal, pictures of the first layer are predicted from pictures of the second layer. It is determined whether or not inter-layer prediction is constrained under the condition that a target block in the first layer has been coded in an intra mode through prediction from a picture of the second layer. An operation for checking a flag “intra_base_flag” indicating whether or not image data of the target block has been coded into difference data with reference to residual data, coded in an intra mode, of a corresponding block of a different layer is skipped if it is determined that inter-layer prediction is constrained. This eliminates the need for an encoder to transmit the flag under the same condition. | 12-11-2008 |
20090041130 | METHOD OF TRANSMITTING PICTURE INFORMATION WHEN ENCODING VIDEO SIGNAL AND METHOD OF USING THE SAME WHEN DECODING VIDEO SIGNAL - A method of transmitting picture information of a video signal from an encoder and a method of using the picture information in a decoder are provided. When a video signal is encoded, the video signal is coded according to a specified scheme while being divided into key and non-key pictures, and a value indicating whether or not coded picture data carried in each NAL unit is key picture data is recorded in a ‘nal_ref_idc’ field in a header of the NAL unit or, alternatively, a value (adaptive_ref_pic_marking_mode_flag=1) indicating that a Memory Management Control Operation (MMCO) is present and a control operation value indicating a key picture are recorded in a header of a picture coded into a key picture. | 02-12-2009 |
20090067502 | Method for Scalably Encoding and Decoding Video Signal - The present invention relates to a method for scalably encoding and decoding a video signal. In an embodiment of the present invention, motion information, such as reference indices, motion vector, modes, etc., for an enhanced layer can be derived from a base layer, and a reference index for an image block in the enhanced layer is determined using median criterion based upon the base layer. A reference index for a block, having the most pixels corresponding to those of the image block, in the base layer is selected as the reference index for the image block, and the nearer reference index is selected if more than one block in the base layer have the same pixels corresponding to those of the image block. And, a motion vector for the base layer block related to the selected reference index is selected as the motion vector for the image block. | 03-12-2009 |
20090168873 | Method for Modeling Coding Information of a Video Signal for Compressing/Decompressing Coding Information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer. | 07-02-2009 |
20090185627 | METHOD FOR SCALABLY ENCODING AND DECODING VIDEO SIGNAL - In one embodiment, decoding of a video signal includes predicting at least a portion of a current image in a current layer based on at least a portion of a base image in a base layer and shift information for samples in the predicted current image. | 07-23-2009 |
20090196354 | METHOD FOR SCALABLY ENCODING AND DECODING VIDEO SIGNAL - In one embodiment, decoding of a video signal includes predicting at least a portion of a current image in a current layer based on at least a portion of a base image in a base layer and shift information for samples in the predicted current image. | 08-06-2009 |
20090274214 | METHOD FOR PROVIDING AND USING INFORMATION ABOUT INTER-LAYER PREDICTION FOR VIDEO SIGNAL - Disclosed is a method for providing and using information about inter-layer prediction when providing a video signal to a plurality of layers by encoding the video signal. The method for encoding an image signal to bit streams of an enhanced layer and a base layer, includes the steps of coding an image block in a picture of the enhanced layer into residual data based on image data of a block of the base layer corresponding to the vide block, and providing indication information through the bit stream of the enhanced layer, the indication information representing whether the coding is achieved in inter-layer prediction constraint or inter-layer prediction unconstraint. | 11-05-2009 |
20100020876 | Method for Modeling Coding Information of a Video Signal To Compress/Decompress the Information - A method for context modeling of coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a corresponding video signal of a base layer. | 01-28-2010 |
20100183079 | Method for modeling coding information of video signal for compressing/decompressing coding information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer. | 07-22-2010 |
20100183080 | Method for modeling coding information of video signal for compressing/decompressing coding information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer. | 07-22-2010 |
20100272188 | Method for scalably encoding and decoding video signal - In one embodiment, decoding of a video signal includes predicting at least a portion of a current image in a current layer based on at least a residual coded portion of a base image in a base layer and shift information for samples in the predicted current image. | 10-28-2010 |
20110019739 | Method for modeling coding information of a video signal to compress/decompress the information - A method and an apparatus of decoding a video signal are provided. The present invention includes the steps of parsing first coding information indicating whether a residual data of an image block in the enhanced layer is predicted from a corresponding block in the base layer, from the bitstream of the enhanced layer, and decoding the video signal based on the first coding information. And, the step of parsing includes the step of performing modeling the first coding information based on second coding information indicating whether prediction information of the corresponding block in the base layer is used to decode the image block in the enhanced layer. Accordingly, the present invention raises efficiency of video signal processing by enabling a decoder to derive information on a prediction mode of a current block in a decoder instead of transferring the information to the decoder. | 01-27-2011 |
20130058399 | Method For Modeling Coding Information Of Video Signal For Compressing/Decompressing Coding Information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer. | 03-07-2013 |
20130064300 | Method For Modeling Coding Information Of Video Signal For Compressing/Decompressing Coding Information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer. | 03-14-2013 |
20130070850 | Method For Modeling Coding Information Of A Video Signal To Compress/Decompress The Information - A method and an apparatus of decoding a video signal are provided. The present invention includes the steps of parsing first coding information indicating whether a residual data of an image block in the enhanced layer is predicted from a corresponding block in the base layer, from the bitstream of the enhanced layer, and decoding the video signal based on the first coding information. And, the step of parsing includes the step of performing modeling of the first coding information based on second coding information indicating whether prediction information of the corresponding block in the base layer is used to decode the image block in the enhanced layer. Accordingly, the present invention raises efficiency of video signal processing by enabling a decoder to derive information on a prediction mode of a current block in a decoder instead of transferring the information to the decoder. | 03-21-2013 |