# US 12,010,308 B2 · Method and device for transmitting block division information in image codec for security camera > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,308 B2 - Document ID: US12010308B2 - Status: Granted - Kind: B2 - Application number: 18/469,960 - Filed: 2023-09-19 - Published: 2024-01-04 - Granted: 2024-06-11 - Earliest claimed: 2016-08-22 - Assignees: Goldenwavepartners Co., Ltd. - Applicants: Goldenwavepartners Co., Ltd. - Inventors: Donggyu Sim; Yongjo Ahn; Seanae Park - Web page: https://patentgrep.com/patent/US12010308B2 ## CPC - H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks - H04N 7/18: Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast - H04N 7/183: {for receiving images from a single remote source} - H04N 19/124: Quantisation - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder - H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N 19/91: Entropy coding, e.g. variable length coding [VLC] or arithmetic coding - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The method of claim 1, wherein the first division information indicates that the coding block is divided into four sub-blocks in horizontal and vertical directions. ### Claim 3 (depends on 1) The method of claim 1, wherein the division direction is one of a horizontal direction or a vertical direction. ### Claim 4 (depends on 3) The method of claim 3, wherein two sub-blocks obtained by the binary-division are a same size. ### Claim 5 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. ### Claim 6 (depends on 5) The method of claim 5, wherein the first division information indicates that the coding block is divided into four sub-blocks in horizontal and vertical directions. ### Claim 7 (depends on 5) The method of claim 5, wherein the division direction is one of a horizontal direction or a vertical direction. ### Claim 8 (depends on 7) The method of claim 7, wherein two sub-blocks obtained by the binary-division are a same size. ### Claim 9 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. ### Claim 10 (depends on 9) The transmission method of claim 9, wherein the first division information indicates that the coding block is divided into four sub-blocks in horizontal and vertical directions. ### Claim 11 (depends on 9) The transmission method of claim 9, wherein the division direction is one of a horizontal direction or a vertical direction. ### Claim 12 (depends on 11) The transmission method of claim 11, wherein two sub-blocks obtained by the binary-division are a same size.