Abstract:
Region of Interest (ROI) scalability with SHVC is able to be implemented where scalability is used for part of a picture but not the whole picture. Applications of ROI scalability include traffic monitoring, security monitoring and tiled streaming.
Abstract:
A method of performing compression of image data for at least one image is described. The method comprises receiving image data of at least a part of the at least one image, encoding the received image data into at least one compressed data block, applying at least one bandwidth limit to the at least one compressed data block, and outputting the at least one bandwidth limited compressed data block to a buffer. The method further comprises dynamically updating the at least one bandwidth limit applied to the at least one compressed data block base at least partly on a fill level of the buffer.
Abstract:
Provided is an image processing device including a selection section configured to select, from a plurality of transform units with different sizes, a transform unit used for inverse orthogonal transformation of image data to be decoded, a generation section configured to generate, from a first quantization matrix corresponding to a transform unit for a first size, a second quantization matrix corresponding to a transform unit for a second size from a first quantization matrix corresponding to a transform unit for a first size, and an inverse quantization section configured to inversely quantize transform coefficient data for the image data using the second quantization matrix generated by the generation section when the selection section selects the transform unit for the second size.
Abstract:
Lossless image compression using differential transfers may involve an image compression unit receiving image data for an image in a sequence of images and transmitting the image data such that image data for at least some image tiles is transmitted using lossy compression due to resource limitations. The image compression unit may then receive image data for a subsequent image in the sequence and determine that the image data for at least some tiles does not change relative to the image data for corresponding tiles of the previous image. The image compression unit may then transmit image data in a manner sufficient to create lossless versions of tiles for which lossily compressed image data was sent previously.
Abstract:
An objective of the present invention is to make a video image frame into a hierarchical structure represented with a plurality of resolutions. With a zeroth layer (30), a first layer (32), a second layer (34), and a third layer (36) in order by increasing resolution, layer data which denotes a frame at a time (t1) treats the zeroth layer (30) and the second layer (34) as base image layers, and the first layer (32) and third layer (36) as difference image layers. In such a circumstance, when a region (124a) is displayed with the resolution of the third layer (36), an image of a corresponding region (126a) which the second layer (34) retains is enlarged to the resolution of the third layer (36) and each pixel value added to a difference image of a region (124a) which the third layer (36) retains. The layer which is treated as the difference image layer is switched with the passage of time (t2, t3, ...).