Patent application number | Description | Published |
20090041123 | GENERALIZED SCALABILITY FOR VIDEO CODER BASED ON VIDEO OBJECTS - A video coding system that codes video objects as scalable video object layers. Data of each video object may be segregated into one or more layers. A base layer contains sufficient information to decode a basic representation of the video object. Enhancement layers contain supplementary data regarding the video object that, if decoded, enhance the basic representation obtained from the base layer. The present invention thus provides a coding scheme suitable for use with decoders of varying processing power. A simple decoder may decode only the base layer of video objects to obtain the basic representation. However, more powerful decoders may decode the base layer data of video objects and additional enhancement layer data to obtain improved decoded output. The coding scheme supports enhancement of both the spatial resolution and the temporal resolution of video objects. | 02-12-2009 |
20090213932 | BIDIRECTIONAL PREDICTED PICTURES OR VIDEO OBJECT PLANES FOR EFFICIENT AND FLEXIBLE CODING - A method is provided for decoding a bit stream representing an image that has been encoded The method includes the steps of: performing an entropy decoding of the bit stream to form a plurality of transform coefficients and a plurality of motion vectors; performing an inverse transformation on the plurality of transform coefficients to form a plurality of error blocks; determining a plurality of predicted blocks based on bidirectional motion estimation that employs the motion vectors, wherein the bidirectional motion estimation includes a direct prediction mode and a second prediction mode; and, adding the plurality of error blocks to the plurality of predicted blocks to form the image. The second prediction mode may include forward, backward, and interpolated prediction modes. | 08-27-2009 |
20100067576 | Method and Apparatus to Prioritize Video Information During Coding and Decoding - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information | 03-18-2010 |
20110075739 | Video Coder Providing Implicit Coefficient Prediction and Scan Adaptation for Image Coding and Intra Coding of Video - A predictive video coder performs gradient prediction based on previous blocks of image data. For a new block of image data, the prediction determines a horizontal gradient and a vertical gradient from a block diagonally above the new block (vertically above a previous horizontally adjacent block). Based on these gradients, the encoder predicts image information based on image information of either the horizontally adjacent block or a block vertically adjacent to the new block. The encoder determines a residual that is transmitted in an output bitstream. The decoder performs the identical gradient prediction and predicts image information without need for overhead information. The decoder computes the actual information based on the predicted information and the residual from the bitstream. | 03-31-2011 |
20110268189 | METHOD AND APPARATUS TO PRIORITIZE VIDEO INFORMATION DURING DOCING AND DECODING - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information | 11-03-2011 |
20120069900 | SYSTEM, METHOD AND COMPUTER-READABLE MEDIUM FOR ENCODING A SIGNAL INTO MACROBLOCKS - A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small. | 03-22-2012 |
20130007209 | Interaction Modalities for Multimedia Delivery and Presentation - A method and apparatus for displaying received data, analyze the quality of the displayed data formulating a media-parameter suggestion for the encoder to alter the characteristics of data to be sent to the receiver, and sending from the receiver, the formulated suggestion. | 01-03-2013 |
20130013989 | Systems and Methods for Playing, Browsing and Interacting with MPEG-4 Coded Audio-Visual Objects - A number of novel configurations for MPEG-4 playback, browsing and user interaction are disclosed. MPEG-4 playback systems are not simple extensions of MPEG-2 playback systems, but, due to object based nature of MPEG-4, present new opportunities and challenges in synchronized management of independent coded objects as well as scene composition and presentation. Therefore, these configurations allow significantly new and enhanced multimedia services and systems. In addition, MPEG-4 aims for an advanced functionality, called Adaptive Audio Visual Session (AAVS) or MPEG-J. Adaptive Audio Visual Session (AAVS) (i.e., MPEG-AAVS, MPEG-Java or MPEG-J) requires, in addition to the definition of configurations, a definition of an application programming interface (API) and its organization into Java packages. Also disclosed are concepts leading to definition of such a framework. | 01-10-2013 |
20130156102 | METHOD AND APPRATUS TO PRIORITIZE VIDEO INFORMATION DURING CODING AND DECODING - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information | 06-20-2013 |
20130170563 | GENERALIZED SCALABILITY FOR VIDEO CODER BASED ON VIDEO OBJECTS - A video coding system that codes video objects as scalable video object layers. Data of each video object may be segregated in to one or more layers. A base layer contains sufficient information to decode a basic representation of the video object. Enhancement layers contain supplementary data regarding the video object that, if decoded, enhance the basic representation obtained from the base layer. The present invention thus provides a coding scheme suitable for use with decoders of varying processing power. A simple decoder may decode only the base layer of the video objects to obtain the basic representation. However, more powerful decoders may decode the base layer data of video objects and additional enhancement layer data to obtain improved decoded output. The coding scheme supports enhancement of both the spatial resolution and the temporal resolution of video object. | 07-04-2013 |
20130235930 | SYSTEM, METHOD AND COMPUTER-READABLE MEDIUM FOR ENCODING A SIGNAL INTO MACROBLOCKS - A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small. | 09-12-2013 |
20140098863 | VIDEO CODER PROVIDING IMPLICIT COEFFICIENT PREDICTION AND SCAN ADAPTATION FOR IMAGE CODING AND INTRA CODING OF VIDEO - A predictive video coder performs gradient prediction based on previous blocks of image data. For a new block of image data, the prediction determines a horizontal gradient and a vertical gradient from a block diagonally above the new block (vertically above a previous horizontally adjacent block). Based on these gradients, the encoder predicts image information based on image information of either the horizontally adjacent block or a block vertically adjacent to the new block. The encoder determines a residual that is transmitted in an output bitstream. The decoder performs the identical gradient prediction and predicts image information without need for overhead information. The decoder computes the actual information based on the predicted information and the residual from the bitstream. | 04-10-2014 |
20140115107 | INTERACTION MODALITIES FOR MULTIMEDIA DELIVERY AND PRESENTATION - A method and apparatus for displaying received data, analyze the quality of the displayed data formulating a media-parameter suggestion for the encoder to alter the characteristics of data to be sent to the receiver, and sending from the receiver, the formulated suggestion. | 04-24-2014 |