METHOD AND APPARATUS FOR ENCODING/DECODING THE MOTION VECTORS OF A PLURALITY OF REFERENCE PICTURES, AND APPARATUS AND METHOD FOR IMAGE ENCODING/DECODING USING SAME
First Claim
1. A video decoding method using an inter prediction, the method comprising:
- reconstructing a first differential motion vector and a second differential motion vector of a current block by decoding encoded data;
deriving a first predicted motion vector and a second predicted motion vector of the current block from one or more neighboring blocks of the current block;
generating a first motion vector of the current block by adding the first candidate motion vector to the first differential motion vector, and a second motion vector of the current block by adding the second candidate motion vector to the second differential motion vector;
generating a predicted block of the current block by using the first and second motion vectors;
reconstructing a residual block by decoding residual signals included in the encoded data; and
adding each pixel value of the predicted block to a corresponding pixel value of the residual block,wherein the reconstruction of the residual block comprises;
identifying one or more conditions for enabling an inverse quantization and an inverse transform; and
reconstructing the residual block by selecting one of the following processes according to the one or more identified conditions;
skipping both of the inverse quantization and the inverse transform for the decoded residual signals,inversely quantizing the decoded residual signals and skipping the inverse transform for the inversely quantized residual signals, andinversely quantizing the decoded residual signals and inversely transforming the inversely quantized residual signals.
1 Assignment
0 Petitions
Accused Products
Abstract
A video decoding method using an inter prediction, includes: reconstructing a first differential motion vector and a second differential motion vector of a current block by decoding encoded data; deriving a first predicted motion vector and a second predicted motion vector of the current block from one or more neighboring blocks of the current block; generating a first motion vector of the current block by adding the first candidate motion vector to the first differential motion vector, and a second motion vector of the current block by adding the second candidate motion vector to the second differential motion vector; generating a predicted block of the current block by using the first and second motion vectors; reconstructing a residual block by decoding residual signals included in the encoded data; and adding each pixel value of the predicted block to a corresponding pixel value of the residual block.
-
Citations
14 Claims
-
1. A video decoding method using an inter prediction, the method comprising:
-
reconstructing a first differential motion vector and a second differential motion vector of a current block by decoding encoded data; deriving a first predicted motion vector and a second predicted motion vector of the current block from one or more neighboring blocks of the current block; generating a first motion vector of the current block by adding the first candidate motion vector to the first differential motion vector, and a second motion vector of the current block by adding the second candidate motion vector to the second differential motion vector; generating a predicted block of the current block by using the first and second motion vectors; reconstructing a residual block by decoding residual signals included in the encoded data; and adding each pixel value of the predicted block to a corresponding pixel value of the residual block, wherein the reconstruction of the residual block comprises; identifying one or more conditions for enabling an inverse quantization and an inverse transform; and reconstructing the residual block by selecting one of the following processes according to the one or more identified conditions; skipping both of the inverse quantization and the inverse transform for the decoded residual signals, inversely quantizing the decoded residual signals and skipping the inverse transform for the inversely quantized residual signals, and inversely quantizing the decoded residual signals and inversely transforming the inversely quantized residual signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A video decoding apparatus using an inter prediction, the apparatus comprising:
-
an information extractor configured to reconstruct a first differential motion vector and a second differential motion vector of a current block by decoding encoded data; a predictor configured to derive a first predicted motion vector and a second predicted motion vector of the current block from one or more neighboring blocks of the current block, generate a first motion vector of the current block by adding the first candidate motion vector to the first differential motion vector, and a second motion vector of the current block by adding the second candidate motion vector to the second differential motion vector, and generate a predicted block of the current block by using the first and second motion vectors; a decoder configured to reconstruct a residual block by decoding residual signals included in the encoded data; and an adder configured to add each pixel value of the predicted block to a corresponding pixel value of the residual block, wherein the decoder is further configured to identify one or more conditions for enabling an inverse quantization and an inverse transform; and reconstruct the residual block by selecting one of the following processes according to the one or more identified conditions; skipping both of the inverse quantization and the inverse transform for the decoded residual signals, inversely quantizing the decoded residual signals and skipping the inverse transform for the inversely quantized residual signals, and inversely quantizing the decoded residual signals and inversely transforming the inversely quantized residual signals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification