公开(公告)号：US20170018247A1

公开(公告)日：2017-01-19

申请号：US14799855

申请日：2015-07-15

Applicant: Apple Inc.

Inventor： Jeffrey E. Frederiksen ,  Peter F. Holland

IPC: G09G5/00

CPC classification number: G09G5/395 ,  G09G5/39 ,  G09G2320/103 ,  G09G2330/021 ,  G09G2340/02 ,  G09G2340/0407 ,  G09G2340/10 ,  G09G2350/00 ,  G09G2360/121

Abstract: A system and method for display frame compression and write to memory are disclosed. A display pipe is configured to generate frames for display. Additionally, the display pipe may be configured to initiate compression of a frame prior to detection of an idle condition. The display pipe may also be configured to determine to selectively allow write-back logic to operate responsive to detecting various conditions. The display pipe may compress a frame and compare the size of the frame as compressed to a threshold value. If the size of the compressed frame exceeds the threshold value, write back of the compressed frame to memory is prevented. Write back of the compressed frame may be further conditioned on the detection of other conditions.

Abstract translation: 公开了一种用于显示帧压缩和写入存储器的系统和方法。 显示管被配置为生成用于显示的帧。 另外，显示管可以被配置为在检测到空闲状态之前启动帧的压缩。 显示管还可以被配置为确定响应于检测各种条件而选择性地允许回写逻辑操作。 显示管可以压缩帧并将被压缩的帧的大小与阈值进行比较。 如果压缩帧的大小超过阈值，则阻止将压缩帧回写到存储器。 可以对其他条件的检测进一步调节压缩帧的回写。

公开(公告)号：US08866646B2

公开(公告)日：2014-10-21

申请号：US13743544

申请日：2013-01-17

Applicant: Apple Inc.

Inventor： Jeffrey E. Frederiksen ,  Michael Frank

IPC: H03M7/30 ,  G06K9/36 ,  G06T9/00 ,  H04N9/67 ,  H04N19/146

CPC classification number: G06K9/36 ,  G06F2212/401 ,  G06T9/007 ,  H04N9/67 ,  H04N19/146

Abstract: In an embodiment, a compression unit is provided which may perform compression of images with low latency and relatively little hardware. Similarly, a decompression unit may be provided which may decompress the images with low latency and hardware. In an embodiment, the transmission of compressed coefficients may be performed using less than two passes through the list of coefficients. During the first pass, the most significant coefficients may be transmitted and other significance groups may be identified as linked lists. The linked lists may then be traverse to send the other significance groups. In an embodiment, a color space conversion may be made to permit filtering of fewer color components than might be possible in the source color space.

Abstract translation: 在一个实施例中，提供了压缩单元，其可以执行具有低延迟和相对较少硬件的图像的压缩。 类似地，可以提供可以以低延迟和硬件解压缩图像的解压缩单元。 在一个实施例中，可以使用少于两次通过系数列表来执行压缩系数的传输。 在第一次通过期间，可以发送最重要的系数，并且可以将其他重要组识别为链表。 然后可以遍历链接列表以发送其他重要组。 在一个实施例中，可以进行颜色空间转换以允许对源颜色空间中可能的颜色分量进行滤波。

公开(公告)号：US20140169693A1

公开(公告)日：2014-06-19

申请号：US13718442

申请日：2012-12-18

Applicant: APPLE INC.

Inventor： Albert C. Kuo ,  Jeffrey E. Frederiksen ,  Michael Frank

IPC: G06T9/00

CPC classification number: H04N19/174 ,  H04N19/436 ,  H04N19/635

Abstract: In an embodiment, a compression unit is provided which may perform compression of a pixel stream. Similarly, a decompression unit may be provided which may decompress the compressed pixel stream. The compression and decompression units may include a streaming wavelet transform, which may perform the wavelet transform through a pipeline of wavelet operations. Each section of the pipeline may perform a pass of the wavelet transform on the pixel stream, and the section may provide input to another section of the pipeline that performs a next pass of the wavelet transform. The transform may thus be performed on the fly as the pixels are received.

Abstract translation: 在一个实施例中，提供了可执行像素流的压缩的压缩单元。 类似地，可以提供可以解压缩压缩像素流的解压缩单元。 压缩和解压缩单元可以包括流小波变换，其可以通过小波操作的流水线执行小波变换。 流水线的每个部分可以在像素流上执行小波变换的通过，并且该部分可以向执行小波变换的下一遍的流水线的另一部分提供输入。 因此，可以在接收到像素时在飞行中执行变换。

公开(公告)号：US09344613B2

公开(公告)日：2016-05-17

申请号：US14171377

申请日：2014-02-03

Applicant: APPLE INC.

Inventor： Guy Cote ,  Jeffrey E. Frederiksen

IPC: H04N5/225 ,  H04N5/228 ,  H04N5/235

CPC classification number: H04N5/2256 ,  H04N5/225 ,  H04N5/228 ,  H04N5/2354

Abstract: Certain aspects of this disclosure relate to an image signal processing system that includes a flash controller that is configured to activate a flash device prior to the start of a target image frame by using a sensor timing signal. In one embodiment, the flash controller receives a delayed sensor timing signal and determines a flash activation start time by using the delayed sensor timing signal to identify a time corresponding to the end of the previous frame, increasing that time by a vertical blanking time, and then subtracting a first offset to compensate for delay between the sensor timing signal and the delayed sensor timing signal. Then, the flash controller subtracts a second offset to determine the flash activation time, thus ensuring that the flash is activated prior to receiving the first pixel of the target frame.

公开(公告)号：US08989509B2

公开(公告)日：2015-03-24

申请号：US13718442

申请日：2012-12-18

Applicant: Apple Inc.

Inventor： Albert C. Kuo ,  Jeffrey E. Frederiksen ,  Michael Frank

IPC: G06K9/36 ,  G06T9/00 ,  G06K9/46

CPC classification number: H04N19/174 ,  H04N19/436 ,  H04N19/635

Abstract: In an embodiment, a compression unit is provided which may perform compression of a pixel stream. Similarly, a decompression unit may be provided which may decompress the compressed pixel stream. The compression and decompression units may include a streaming wavelet transform, which may perform the wavelet transform through a pipeline of wavelet operations. Each section of the pipeline may perform a pass of the wavelet transform on the pixel stream, and the section may provide input to another section of the pipeline that performs a next pass of the wavelet transform. The transform may thus be performed on the fly as the pixels are received.

Abstract translation: 在一个实施例中，提供了可执行像素流的压缩的压缩单元。 类似地，可以提供可以解压缩压缩像素流的解压缩单元。 压缩和解压缩单元可以包括流小波变换，其可以通过小波操作的流水线执行小波变换。 流水线的每个部分可以在像素流上执行小波变换的通过，并且该部分可以向执行小波变换的下一遍的流水线的另一部分提供输入。 因此，可以在接收到像素时在飞行中执行变换。

公开(公告)号：US20140161367A1

公开(公告)日：2014-06-12

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

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。

公开(公告)号：US20140240587A1

公开(公告)日：2014-08-28

申请号：US14171377

申请日：2014-02-03

Applicant: Apple Inc.

Inventor： Guy Cote ,  Jeffrey E. Frederiksen

IPC: H04N5/225

CPC classification number: H04N5/2256 ,  H04N5/225 ,  H04N5/228 ,  H04N5/2354

Abstract: Certain aspects of this disclosure relate to an image signal processing system that includes a flash controller that is configured to activate a flash device prior to the start of a target image frame by using a sensor timing signal. In one embodiment, the flash controller receives a delayed sensor timing signal and determines a flash activation start time by using the delayed sensor timing signal to identify a time corresponding to the end of the previous frame, increasing that time by a vertical blanking time, and then subtracting a first offset to compensate for delay between the sensor timing signal and the delayed sensor timing signal. Then, the flash controller subtracts a second offset to determine the flash activation time, thus ensuring that the flash is activated prior to receiving the first pixel of the target frame.

Abstract translation: 本公开的某些方面涉及一种图像信号处理系统，其包括闪存控制器，其被配置为通过使用传感器定时信号来在目标图像帧开始之前激活闪存设备。 在一个实施例中，闪光灯控制器接收延迟的传感器定时信号，并通过使用延迟的传感器定时信号来确定闪光激活开始时间，以识别对应于先前帧的结束的时间，通过垂直消隐时间增加该时间，以及 然后减去第一偏移量来补偿传感器定时信号和延迟的传感器定时信号之间的延迟。 然后，闪存控制器减去第二偏移量以确定闪光激活时间，从而确保在接收到目标帧的第一像素之前闪光被激活。

公开(公告)号：US08643770B2

公开(公告)日：2014-02-04

申请号：US13923175

申请日：2013-06-20

Applicant: Apple Inc.

Inventor： Guy Cote ,  Jeffrey E. Frederiksen

IPC: H04N5/235

CPC classification number: H04N5/2256 ,  H04N5/225 ,  H04N5/228 ,  H04N5/2354

Abstract: Certain aspects of this disclosure relate to an image signal processing system that includes a flash controller that is configured to activate a flash device prior to the start of a target image frame by using a sensor timing signal. In one embodiment, the flash controller receives a delayed sensor timing signal and determines a flash activation start time by using the delayed sensor timing signal to identify a time corresponding to the end of the previous frame, increasing that time by a vertical blanking time, and then subtracting a first offset to compensate for delay between the sensor timing signal and the delayed sensor timing signal. Then, the flash controller subtracts a second offset to determine the flash activation time, thus ensuring that the flash is activated prior to receiving the first pixel of the target frame.

Abstract translation: 本公开的某些方面涉及一种图像信号处理系统，其包括闪存控制器，其被配置为通过使用传感器定时信号来在目标图像帧开始之前激活闪存设备。 在一个实施例中，闪光灯控制器接收延迟的传感器定时信号，并通过使用延迟的传感器定时信号来确定闪光激活开始时间，以识别对应于先前帧的结束的时间，通过垂直消隐时间增加该时间，以及 然后减去第一偏移量来补偿传感器定时信号和延迟的传感器定时信号之间的延迟。 然后，闪存控制器减去第二偏移量以确定闪光激活时间，从而确保在接收到目标帧的第一像素之前闪光被激活。

公开(公告)号：US20130286242A1

公开(公告)日：2013-10-31

申请号：US13923175

申请日：2013-06-20

Applicant: APPLE INC.

Inventor： Guy Cote ,  Jeffrey E. Frederiksen

IPC: H04N5/225

CPC classification number: H04N5/2256 ,  H04N5/225 ,  H04N5/228 ,  H04N5/2354

Abstract: Certain aspects of this disclosure relate to an image signal processing system that includes a flash controller that is configured to activate a flash device prior to the start of a target image frame by using a sensor timing signal. In one embodiment, the flash controller receives a delayed sensor timing signal and determines a flash activation start time by using the delayed sensor timing signal to identify a time corresponding to the end of the previous frame, increasing that time by a vertical blanking time, and then subtracting a first offset to compensate for delay between the sensor timing signal and the delayed sensor timing signal. Then, the flash controller subtracts a second offset to determine the flash activation time, thus ensuring that the flash is activated prior to receiving the first pixel of the target frame.

Abstract translation: 本公开的某些方面涉及一种图像信号处理系统，其包括闪存控制器，其被配置为通过使用传感器定时信号来在目标图像帧开始之前激活闪存设备。 在一个实施例中，闪光灯控制器接收延迟的传感器定时信号，并通过使用延迟的传感器定时信号来确定闪光激活开始时间，以识别对应于先前帧的结束的时间，通过垂直消隐时间增加该时间，以及 然后减去第一偏移量来补偿传感器定时信号和延迟的传感器定时信号之间的延迟。 然后，闪存控制器减去第二偏移量以确定闪光激活时间，从而确保在接收到目标帧的第一像素之前闪光被激活。

公开(公告)号：US20130129246A1

公开(公告)日：2013-05-23

申请号：US13743544

申请日：2013-01-17

Applicant: Apple Inc.

Inventor： Jeffrey E. Frederiksen ,  Michael Frank

IPC: G06K9/36

CPC classification number: G06K9/36 ,  G06F2212/401 ,  G06T9/007 ,  H04N9/67 ,  H04N19/146

Abstract: In an embodiment, a compression unit is provided which may perform compression of images with low latency and relatively little hardware. Similarly, a decompression unit may be provided which may decompress the images with low latency and hardware. In an embodiment, the transmission of compressed coefficients may be performed using less than two passes through the list of coefficients. During the first pass, the most significant coefficients may be transmitted and other significance groups may be identified as linked lists. The linked lists may then be traverse to send the other significance groups. In an embodiment, a color space conversion may be made to permit filtering of fewer color components than might be possible in the source color space.

Abstract translation: 在一个实施例中，提供了压缩单元，其可以执行具有低延迟和相对较少硬件的图像的压缩。 类似地，可以提供可以以低延迟和硬件解压缩图像的解压缩单元。 在一个实施例中，可以使用少于两次通过系数列表来执行压缩系数的传输。 在第一次通过期间，可以发送最重要的系数，并且可以将其他重要组识别为链表。 然后可以遍历链接列表以发送其他重要组。 在一个实施例中，可以进行颜色空间转换以允许对源颜色空间中可能的颜色分量进行滤波。