Abstract:
An image encoding method and an image decoding method, and an image encoder and an image decoder, are provided. The image encoding method includes detecting a static region and a motion region of an image, calculating an encoding error in the image, calculating a film grain noise (FGN) error in the motion region, and encoding the image to reduce an encoding error in the image other than the FGN error.
Abstract:
A video encoding and decoding methods and apparatuses for performing the methods thereof are provided. The video encoding method includes: determining a region in a current image having a change in at least one of a scale and an angle with respect to a reference image; generating variation information representing a variation in at least one of the scale and the angle between the region in the current image and a reference region in the reference image corresponding to the region in the current image; and encoding residual information representing a difference between a predicted sample value from the reference image and a sample value of the current image based on the generated variation information.
Abstract:
A frame rate conversion apparatus includes a memory to store a plurality of frames forming an input image, the plurality of frames including a current frame which includes a plurality of areas; and a processor configured to generate an interpolation frame by performing, with respect to an object area, an interpolation which is different from the interpolation applied to other areas, of the plurality of areas, the object area being an area which includes an object and in which at least one among a size, a speed, and a shape of the object satisfies a certain condition, and to insert the interpolation frame between the current frame and an adjacent frame.
Abstract:
Provided is a video processing device and method capable of managing a security level of content included in a video. The video processing method includes: receiving an identifier of a video and information about a security policy to be set to the video; receiving security information related to the security policy; preparing the video by using the received identifier of the video; and updating security information of the prepared video by using the received security information according to the security policy.
Abstract:
Provided is a multilayer video decoding method including acquiring reset information indicating whether to reset a picture order count (POC) of a current picture, resetting a higher bit of the POC of the current picture based on the reset information, and decoding the current picture by using the reset POC.
Abstract:
Multilayer video encoding/decoding methods and apparatuses are provided. A multilayer video decoding method includes: obtaining inter-layer prediction allowance information from a bitstream; obtaining single layer use information from the bitstream when the inter-layer prediction allowance information indicates that inter-layer prediction is usable; determining at most only one layer among at least one layer, to which a current picture refers, as a reference layer when the single layer use information indicates that at most one picture is used for inter-layer prediction; and performing inter-layer prediction on the current picture by using a picture belonging to the reference layer.
Abstract:
A method and apparatus for generating a 3K-resolution display image for a mobile terminal screen are disclosed. The method includes: receiving an input image; selecting a 3K resolution as a resolution of an image to be reproduced on the mobile terminal screen of a predetermined size, based on human cognitive characteristics and resolution analytical ability with respect to the mobile terminal screen; and generating a display image having the selected 3K resolution by using the input image.
Abstract:
Disclosed is a depth map frame decoding method including reconstructing a color frame obtained from a bitstream based on encoding information of the color frame; splitting a largest coding unit of a depth map frame obtained from the bitstream into one or more coding units based on split information of the depth map frame; splitting the one or more coding units into one or more prediction units for prediction decoding; determining whether to split a current prediction unit into at least one partition and decode the current prediction unit by obtaining information indicating whether to split the current prediction unit into the at least one or more partitions from the bitstream; if it is determined that the current prediction unit is to be decoded by being split into the at least one or more partitions, obtaining prediction information of the one or more prediction units from the bitstream and determining whether to decode the current prediction unit by using differential information indicating a difference between a depth value of the at least one or more partitions corresponding to an original depth map frame and a depth value of the at least one or more partitions predicted from neighboring blocks of the current prediction unit; and decoding the current prediction unit by using the differential information based on whether to split the current prediction unit into the at least one or more partitions and whether to use the differential information.
Abstract:
A method of prediction decoding a multilayer video is provided. The method includes for each layer of a multilayer video, obtaining information indicating whether a layer included in the multilayer video is used as a reference layer of a current layer; and obtaining an inter layer reference picture set (RPS) of the current layer in which each reference layer is aligned according to a difference value in a layer index value between the current layer and a layer used as the reference layer of the current layer based on the obtained information.
Abstract:
Provided is a method of decoding a video, the method including: obtaining, from a received data stream, information indicating whether a current slice segment is a dependent slice segment; obtaining constraint information from a reserved bit included in the received data stream when the current slice segment is not the dependent slice segment, based on the obtained information; and determining whether the current image is used as a reference image for predicting another image, based on the obtained constraint information.