公开(公告)号：US09386318B2

公开(公告)日：2016-07-05

申请号：US14035682

申请日：2013-09-24

Applicant: Apple Inc.

Inventor： Robert L. Ridenour ,  Jeffrey E. Frederiksen ,  Ian C. Hendry

IPC: G06T9/00 ,  H04N19/137 ,  H04N19/115 ,  H04N19/12 ,  H04N19/176 ,  H04N19/46 ,  H04N19/30 ,  H04N19/15 ,  H04N19/63 ,  H04N19/107 ,  H04N19/547

CPC classification number: H04N19/137 ,  H04N19/107 ,  H04N19/115 ,  H04N19/12 ,  H04N19/15 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46 ,  H04N19/547 ,  H04N19/63

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 translation: 使用差分传送的无损图像压缩可以涉及图像压缩单元，其接收图像序列中的图像的图像数据，并发送图像数据，使得由于资源限制，使用有损压缩来传送至少一些图像块的图像数据。 然后，图像压缩单元可以接收序列中的后续图像的图像数据，并且确定用于至少一些瓦片的图像数据相对于先前图像的相应瓦片的图像数据不会改变。 然后，图像压缩单元可以以足以创建先前发送有损压缩图像数据的瓦片的无损版本的方式来发送图像数据。