公开(公告)号：US20130314429A1

公开(公告)日：2013-11-28

申请号：US13898510

申请日：2013-05-21

Applicant: ARM LIMITED

Inventor： Daren CROXFORD ,  Simon JONES ,  Oskar FLORDAL

IPC: G06T1/60

CPC classification number: G06T1/60 ,  G09G5/391 ,  G09G5/393 ,  G09G5/395 ,  G09G2330/021 ,  G09G2340/02

Abstract: Image data is subject to compression and decompression when it is respectively written to and read from a frame buffer. If a portion of the image data is identified as static (subject to less than a threshold amount of change for greater than a threshold time), then compression control parameters used for compression of that portion of the image are adjusted so as to increase the compression ratio achieved, hold the degree of lossiness substantially constant and increase the energy consumed while compressing that portion. The increased energy consumption during this high compression ratio compression is likely compensated for by a reduction in energy subsequently consumed when writing that frame-buffer image data to the frame buffer and reading that frame-buffer image data multiple times from the frame buffer. The compression characteristics varied may be to increase the block size used in the compression. Other variations in compression applied may be to change from single-pass compression to multi-pass compression, switch compression on and off altogether, or reorder the data when it has been compressed so as to match the order it will be read and so achieve support for longer read burst.

Abstract translation: 当图像数据被分别写入帧缓冲器并从帧缓冲器读取时，其被压缩和解压缩。 如果图像数据的一部分被识别为静态（经受小于阈值的变化量大于阈值时间），则调整用于压缩该部分图像的压缩控制参数，以便增加压缩 比率达到，保持损耗程度基本上恒定，并增加在压缩该部分时消耗的能量。 在该高压缩比压缩期间增加的能量消耗可能通过将帧缓冲器图像数据写入帧缓冲器并从帧缓冲器多次读取该帧缓冲器图像数据而随后消耗的能量的减少来补偿。 压缩特性变化可能是增加在压缩中使用的块尺寸。 压缩应用的其他变化可能是从单程压缩转换为多遍压缩，完全切换压缩，或者在压缩数据时重新排序数据，以便匹配读取的顺序，从而实现支持 更长的读取脉冲串。

公开(公告)号：US20170076419A1

公开(公告)日：2017-03-16

申请号：US15254079

申请日：2016-09-01

Applicant: ARM LIMITED

Inventor： Jakob Axel FRIES ,  Henrik Nils-Sture OLSSON ,  Oskar FLORDAL ,  Sharjeel SAEED

IPC: G06T1/20 ,  H04N19/426 ,  H04N19/44 ,  G06T1/60

CPC classification number: G06T1/20 ,  G06T1/60 ,  H04N19/426 ,  H04N19/436

Abstract: An interface apparatus and method of operating the same are provided. The interface apparatus receives an uncompressed image data read request using a first addressing scheme at a first bus interface and transmits a compressed image data read request using a second addressing scheme from a second bus interface. Address translation circuitry translates between the first addressing scheme and the second addressing scheme. Decoding circuitry decodes a set of compressed image data received via the second bus interface to generate the set of uncompressed image data which is then transmitted via the first bus interface. The use of a second addressing scheme and image data compression is thus transparent to the source of the uncompressed image data read request, and the interface apparatus can therefore be used to connect devices which use different addressing schemes and image data formats, without either needing to be modified.

Abstract translation: 提供了一种操作该接口装置和方法。 接口装置在第一总线接口处使用第一寻址方案接收未压缩的图像数据读取请求，并且使用第二寻址方案从第二总线接口发送压缩图像数据读取请求。 地址转换电路在第一寻址方案和第二寻址方案之间转换。 解码电路解码经由第二总线接口接收的一组压缩图像数据，以生成一组未压缩图像数据，然后经由第一总线接口传送。 因此，使用第二寻址方案和图像数据压缩对于未压缩的图像数据读取请求的源是透明的，并且接口装置因此可以用于连接使用不同寻址方案和图像数据格式的设备，而不需要 被修改。