Abstract:
The present invention provides a method for determining an up-sampling filter to accurately interpolate sample values in respective sampling locations according to an up-sampling scale in scalable video encoding/decoding. The up-sampling method for scalable video encoding/decoding includes the steps of: determining a phase-shift between the pixels in a high-definition image and the pixels in a low-definition image based on a scaling factor between the high-definition image and the low-definition image; selecting at least one filter coefficient set corresponding to the phase-shift in filter coefficient data including the filter coefficient sets corresponding to respective phase-shifts to generate another high-definition image by filtering the low-definition image; and generating an enhanced layer bit-stream presenting the up-sampling filter information presenting the phase-shift and high-definition encoding information generated by encoding the high-definition image.
Abstract:
Disclosed is a method for compensating for a motion for encoding/decoding of a scalable video. The method includes the steps of: acquiring a first prediction value of each pixel constituting a current block from a corresponding block of a basic layer corresponding to a current block of an improvement layer; acquiring a second prediction value of each pixel constituting the current block using a block unit bidirectional motion compensation result and a pixel unit motion compensation result for the improvement layer; and acquiring a prediction value of each pixel constituting the current block using a weighted sum of the first prediction value and the second prediction value.
Abstract:
The present invention relates to the signaling of an SAO parameter determined to minimize an error between an original image and a restored image in a video encoding and decoding operation. Disclosed is an SAO decoding method which acquires left SAO aggregation information and upward SAO aggregation information which are entropy-encoded based on a context from the bitstream of the largest coding unit, acquires SAO on/off information which is entropy-encoded based on a context for each color component from the bitstream, acquires offset absolute value information for each SAO category entropy-encoded in a bypass mode, and acquires either the band location information or edge class information which are entropy-encoded in a bypass mode. [Reference numerals] (12) SAO performance part; (14) Entropy encoding part; (16) SAO context encoding part; (18) SAO bypass encoding part; (AA) Bitstream
Abstract:
The present invention suggests a method for determining a reference image for inter prediction and an inter prediction method thereof. The present invention provides an inter prediction method capable of determining a reference picture list using a current prediction unit when a current slice is a B slice, outputting inter prediction index information of the current prediction unit indicating one reference picture list among a L0 list and L1 list when the size of the current prediction unit is 4X8 or 8X4, and outputting one reference picture list among the L0 list, the L1 list, and a pair list when the size of the current unit is not 4X8 or 8X4. [Reference numerals] (12) Reference picture list determining part; (14) Reference index determining part
Abstract:
PURPOSE: A video coding method using offset regulation, an apparatus thereof, a video coding method, and an apparatus thereof are provided to control correcting pixels as offset after restoring offset from bit stream according to an SAO(Sample Adaptive Offset) method. CONSTITUTION: An offset parameter parsing unit(22) performs parsing of offset merge information from bit stream. The offset parameter parsing unit restores offset values and an offset type of a current block based on offset merge information of the current block. An offset controlling unit(24) determines an edge class or a pixel value band. [Reference numerals] (22) Offset parameter parsing unit; (24) Offset controlling unit
Abstract:
PURPOSE: A method for interpolating an image using a smoothing interpolation filter and a device thereof are provided to reduce high frequency components. CONSTITUTION: A filter selecting unit(12) differently selects an interpolation filter from the interpolation filters for generating a pixel value of at least one sub pel unit based on an interpolation location and smoothness of the sub pel unit. An interpolation unit(14) interpolates an integer pel unit neighboring the interpolation location of the sub pel unit by using a selected interpolation filter. The interpolation unit generates a pixel value of the sub pel unit.
Abstract:
PURPOSE: A method and apparatus for encoding and decoding a video signal is provided to increase the exactness of a calculation by increasing a bit depth of the video signal. CONSTITUTION: A video encoding device determines an optimal scaling bit depth of the video signal by considering the maximum bit accuracy of the video signal and the maximum bit of a middle value(333). The video encoding device scales the video signal according to a local shift value. The Video coding apparatus performs the conversion of the scaled video signal.