11results about "Color television with pulse code modulation" patented technology

By implementing a new bitstream for a Delta-Quantization Parameter (DQP), a decoder is able to implement parallel decoding of multiple coding units within a largest coding unit. In some embodiments, the DQP is placed immediately after the mode information of the first coding unit. In some embodiments, the DQP is placed after the mode information of the first non-skipped coding unit. In some embodiments, the DQP is placed after the first non-zero coded block flag.

Methods, systems, and devices for implementing an adaptive color transform (ACT) during image / video encoding and decoding, including: determining, for a conversion between a video including a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion. In response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks. Each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.

To provide a method for an output layer set mode in a multilayered video stream.SOLUTION: A method of decoding may comprise: receiving a bitstream comprising compressed video / image data; parsing or deriving, from the bitstream, an output layer set mode indicator in a video parameter set (VPS); identifying output layer set mode signaling based on the output layer set mode indicator; identifying one or more picture output layers based on the identified output layer set mode signaling; and decoding the identified one or more picture output layers.SELECTED DRAWING: Figure 24

An imaging system includes an imaging unit and an optical system configured to form a low-resolution area at the center of a light receiving surface of the imaging unit and form a high-resolution area in the periphery of the light receiving surface. The optical system is disposed in an upper part of a cabin of a movable apparatus such that an optical axis of the optical system faces downward with respect to a horizontal plane in a state in which the movable apparatus has a horizontal posture. When a focal distance of the optical system is defined as f, a half viewing angle is defined as θ, an image height on an image plane is defined as y, projection characteristics indicating a relationship between the image height y and the half viewing angle θ are defined as y(θ), and a maximum half viewing angle of the optical system is defined as θmax, the optical system is configured to satisfy 0.1<2×f×tan(θmax / 2) / y(θmax)<1.2.

The present invention relates to a method for transmitting five-primary-color image signals based on a standard three-channel approach, comprising the following steps: calculating an encoding matrix for an additional CGB color space to encode the CGB signal into a pseudo-YCbCr signal, and calculating a CGB decoding matrix; calculating an encoding matrix for an additional RGY color space to encode the RGY signal into a pseudo-YCbCr signal; and calculating an RGY decoding matrix. At the transmitting end, the five-primary-color signal is divided according to the color space, with each pixel consisting of three color components (RGB, CGB, or RGY). Standard RGB encoding, CGB encoding, or RGY encoding are used, respectively, to encode the signal into a YCbCr signal for transmission. If the C component value is greater than the R component, the CGB encoding format is used; if the Y component value is greater than the B component, the RGY encoding format is used; otherwise, the RGB encoding format is used. Upon receiving the YCbCr data, the receiving end uses a blind recognition scheme to determine the composition of the three primary colors.

A method for implementing an adaptive color transform (ACT) during image / video encoding and decoding, includes determining, for a conversion between a video including a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion, wherein, in response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks, and wherein each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.

The present disclosure relates generally to video encoding / decoding, and in particular to methods for evaluating codec performance. A method includes obtaining a first set of anchor data points; obtaining a second group of test data points; monotonicity conditions of the first group of anchor point data points and the second group of test data points are analyzed; determining a fitting algorithm based on the analyzed monotonicity condition; fitting the first group of anchor point data points by using a fitting algorithm to obtain an anchor point curve; fitting the second group of test data points by using a fitting algorithm to obtain a test curve; and evaluating the performance of the test codec based on the anchor point curve and the test curve to obtain an evaluation result.

To provide a method for an output layer set mode in a multilayered video stream.SOLUTION: A method of decoding may comprise: receiving a bitstream comprising compressed video / image data; parsing or deriving, from the bitstream, an output layer set mode indicator in a video parameter set (VPS); identifying output layer set mode signaling based on the output layer set mode indicator; identifying one or more picture output layers based on the identified output layer set mode signaling; and decoding the identified one or more picture output layers.SELECTED DRAWING: Figure 24

The present invention aims to reduce a memory bandwidth during image coding. An image coding method includes an acquiring step and a generating step. The acquiring step includes acquiring a reference image. The generating step includes generating a predicted image having resolution larger than that of the reference image, by performing an interpolation to the acquired reference image according to a motion vector for each of the luminance component and the color difference component. The generating step includes generating the predicted image having the color difference component without performing a specific interpolation that means the interpolation processing in which a number of pixels to be accessed in the reference image is large, when a size of a block designated as a unit of the interpolation is smaller than a predetermined threshold value.

The present invention aims to reduce a memory bandwidth during image coding. An image coding method includes an acquiring step and a generating step. The acquiring step includes acquiring a reference image. The generating step includes generating a predicted image having resolution larger than that of the reference image, by performing an interpolation to the acquired reference image according to a motion vector for each of the luminance component and the color difference component. The generating step includes generating the predicted image having the color difference component without performing a specific interpolation that means the interpolation processing in which a number of pixels to be accessed in the reference image is large, when a size of a block designated as a unit of the interpolation is smaller than a predetermined threshold value.