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US 12,010,308 B2Granted
Method and device for transmitting block division information in image codec for security camera
AssigneeGoldenwavepartners Co., Ltd.
InventorsDonggyu Sim, Yongjo Ahn, Seanae Park
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Abstract
The present invention relates to a method and device for transmitting block division information for efficient image coding in a video compression technique for a high-definition security camera. To this end, the present invention obtains block division information from a bitstream, determines the division form of an image by computing and predicting omitted information if there is omitted information in the obtained information, and performs video decoding in the unit of a divided block.
Claims12
A method for decoding a video signal, with a decoding apparatus, comprising:
- determining, with the decoding apparatus, a current block by dividing a coding block,
- wherein the coding block is divided recursively based on at least one of a quad-division or a binary-division,
- wherein the quad-division is performed without extracting first division information for the quad-division from a bitstream, and
- wherein the binary-division is performed by using second division information for the binary-division extracted from the bitstream, the second division information indicating that the binary-division is used or specifying a division direction of the binary-division;
- obtaining, with the decoding apparatus, quantized coefficients from the bitstream;
- obtaining, with the decoding apparatus, a residual signal by performing inverse-quantization and inverse-transform on the quantized coefficients;
- generating, with the decoding apparatus, a prediction signal of the current block by performing intra prediction based on reconstructed pixel values of a neighboring block adjacent to the current block;
- and
- reconstructing, with the decoding apparatus, the current block using the residual signal and the prediction signal.
6 more elements
A method for encoding a video signal, with an encoding apparatus, comprising:
- determining, with the encoding apparatus, a current block by dividing a coding block;
- generating, with the encoding apparatus, a prediction signal of the current block by performing intra prediction based on reconstructed pixel values of a neighboring block adjacent to the current block;
- obtaining, with the encoding apparatus, a residual signal of the current block based on the prediction signal;
- obtaining, with the encoding apparatus, quantized coefficients by performing transform and quantization on the residual signal;
- and
- encoding, with the encoding apparatus, the quantized coefficients to generate a bitstream,
- wherein the coding block is divided recursively based on at least one of a quad-division or a binary-division,
- wherein first division information for the quad-division is not encoded into the bitstream, and
- wherein second division information for the binary-division is encoded into the bitstream, the second division information indicating that the binary-division is used or specifying a division direction of the binary-division.
6 more elements
A transmission method of a video signal with a transmission apparatus, comprising:
- determining, with the transmission apparatus, a current block by dividing a coding block;
- generating, with the transmission apparatus, a prediction signal of the current block by performing intra prediction based on reconstructed pixel values of a neighboring block adjacent to the current block;
- obtaining, with the transmission apparatus, a residual signal of the current block based on the prediction signal;
- obtaining, with the transmission apparatus, quantized coefficients by performing transform and quantization on the residual signal;
- encoding, with the transmission apparatus, the quantized coefficients to generate a bitstream;
- and
- transmitting, with the transmission apparatus, the bitstream including the video signal,
- wherein the coding block is divided recursively based on at least one of a quad-division or a binary-division,
- wherein first division information for the quad-division is not encoded into the bitstream, and
- wherein second division information for the binary-division is encoded into the bitstream, the second division information indicating that the binary-division is used or specifying a division direction of the binary-division.
7 more elements
Dependencies are inferred from the claim text.