Method and apparatus for scalable motion vector coding
a motion vector and coding technology, applied in signal generators with optical-mechanical scanning, color televisions with bandwidth reduction, signal generators, etc., can solve the problem of low bit-rate coding performance, and achieve the effect of improving video visual quality, low bit-rate and resolution
Inactive Publication Date: 2012-04-26
SAMSUNG ELECTRONICS CO LTD
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Benefits of technology
The present invention provides a scalable motion vector coding and decoding method and apparatus for video coding. This method and apparatus allow for motion vectors to be coded and decoded at different levels of accuracy, resulting in improved visual quality at lower bit-rates and resolutions. The scalability is achieved by separating the motion vectors into a base layer and an enhancement layer, with the base layer having lower pixel accuracy and the enhancement layer having higher pixel accuracy. This allows for a layered motion vector to be output, where the base layer includes information about motion vectors of larger blocks and the enhancement layer includes information about motion vectors of smaller blocks. The invention also provides a motion vector restoring unit and a summing unit for extracting and restoring motion vector components and summing them to output a layered motion vector. Overall, the invention improves video quality and provides a better user experience for viewers.
Problems solved by technology
Hence, the coding performance at low bit-rates is relatively poor because the truncated bitstream contains mostly the motion information.
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[0055]Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention and methods of accomplishing the same may be understood more readily by reference to the following detailed description of exemplary embodiments and the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims. Like reference numerals refer to like elements throughout the specification.
[0056]Video compression schemes remove redundant information from input video signals before their transmission, by encoding frames of the input video signals into compressed information...
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A method and apparatus for scalable coding of a motion vector generated during motion estimation, in which a generated motion vector field is separated into a base layer and an enhancement layer according to pixel accuracies to obtain a layered structure for a motion vector. In addition, the motion vector field has a layered structure including a base layer composed of motion vectors of blocks larger than or equal to a predetermined size and at least one enhancement layer composed of motion vectors of blocks smaller than a predetermined size.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a divisional of U.S. application Ser. No. 11 / 370,948 filed Mar. 9, 2006 which claims priority from U.S. Provisional Application No. 60 / 659,423 filed Mar. 9, 2005, the disclosure of each of which are incorporated herein by reference in their entirety. The parent application Ser. No. 11 / 370,948 is also a continuation-in-part application of U.S. application Ser. No. 10 / 864,833 filed Jun. 9, 2004 which claims priority from U.S. Provisional Application No. 60 / 477,183 filed Jun. 10, 2003, the disclosures of which are incorporated herein by reference in their entirety. The parent application Ser. No. 11 / 370,948 is also a continuation-in-part application of U.S. application Ser. No. 10 / 965,237 filed Oct. 14, 2004, which claims priority from U.S. Provisional Application 60 / 512,120, filed Oct. 17, 2003, and U.S. Provisional Application 60 / 477,183, filed Jun. 10, 2003, the disclosures of each of which are incorporated here...
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IPC IPC(8): H04N7/32H04N7/26
CPCH04N19/13H04N19/647H04N19/63H04N19/615H04N19/31H04N19/517H04N19/36H04N19/61
Inventor WOODS, JOHN W.WU, YONGJUN
Owner SAMSUNG ELECTRONICS CO LTD