Qualcomm Incorporated

Thomson Consumer Electronics Inc.

Web Ex Communications, Inc.

Thomson Licensing

Other

Cisco Technology, Inc.

Chia-Yuan Teng

Mehmet Kemal Ozkan

Edwin Arturo Heredia

Gokce Dane

Min Dai

Sharath Manjunath

Yan Ye

Khaled Helmi El-Maleh

Ming-Chang Tsai

Natan Jacobson

Fariborz Pourbigharaz

Moinul H Khan

Khosro Rabii

Suhail Jalil

Jiafu Luo

Chinchuan Andrew Chiu

Carl K Mizuyabu

Yen-Chi Lee

Tauseef Kazi

Ali Iranli

Mohamed Ahmed

Raghavendra Nagaraj

Junchen Du

King-Chung Lai

Raghukul Tilak

Dan MingLun Chuang

Bo Zhou

Songhe Cai

Scott Cheng

Jun Han

John Chi Kit Wong

Rohan Desai

Min Li

Vladan Andrijanic

Ai-Mei Huang

Abhay Raut

Gary Arthur Ciambella

Gregory Allan Vansickle

Krishnam Indukuri

Rakesh Sanam

Simo Petteri Kangaslampi

Yiu-Wing Leung

Mark Jacob Ebling

Sithampara Niranjan

Timothy William Saeger

Natan Haim Jacobson

Khosro M Rabii

Carl Kazumi Mizuyabu

Techniques and systems are provided for processing image data. For example, an image signal processor can obtain (e.g., from a host processor) a first setting change indicator value indicating a change in parameter settings of the image signal processor. The image signal processor can obtain an image frame from an image sensor, and can determine a second setting change indicator value from the image frame. The second setting change indicator value can be provided to the image sensor from the host processor. The second setting change indicator value indicates a change in parameter settings of the image sensor. The image signal processor can compare the first setting change indicator value to the second setting change indicator value, and can determine whether to process the image frame or to drop the image frame based on comparing the first setting change indicator value to the second setting change indicator value.

Synchronization mechanism for image capture and processing systems

This disclosure describes techniques for reducing power consumption of a display device. According to these techniques, a display device is configured to determine whether an image to be displayed by the display device has become static. In response to identifying such a static image, the display device may operate in a static image mode. According to the static image mode, the display device may read a current frame of image data, modify the current frame of image data to generate a modified frame of image data with a reduced size, and store the modified image data in memory. The display device may read the modified image data from memory to present the static image, which may reduce power consumption of the display device.

Static image power management

Systems and methods for adaptive compression mode selection for memory buffers such as those used in or with a portable computing device ('PCD') are presented. During operation of the PCD a first compression mode is selected for a buffer and the buffer is formatted to the first compression mode. Any access to the buffer by a component of the PCD, core of the PCD or software application running on the PCD is monitored. Based on the amount and/or type of access to the buffer, a second compression mode for the buffer is selected. The buffer is formatted to the second compression mode, providing a cost effective ability to adaptively format buffers based on the component(s), cores(s), and/or software application(s) accessing the buffers, and allowing for improving or optimizing bandwidth, memory footprint, resource conflict, power consumption, latency, and/or performance of component(s), core(s), or software application(s) accessing buffers as desired.

System and method for adaptive compression mode selection for buffers in a portable computing device

A method, an apparatus, and a computer program product for processing touchscreen information are provided. The method may include receiving touchscreen data that includes node values representative of signals generated by a touchscreen panel, generating a first data frame including difference values, and transmitting the first data frame over a control data bus. Each of the difference values may be calculated as a difference between one of the node values and a different node-related value wherein the first data frame has a predefined size. The first data frame may be configured to permit a receiver of the first data frame to reconstruct the touchscreen data without information loss.

Efficient lossless compression for peripheral interface data transfer

Certain aspects relate to systems and techniques for compressing image data using pattern mode compression schemes. A pattern mode compression scheme can reduce the amount of data stored in a frame buffer to reduce power costs of an image display system. In some implementations, pattern mode compression can be suitable for compression of pixel blocks having a limited color palette with one or more pixels of a different foreground color, and a slope-enabled pattern compression can be suitable for compression of pixel blocks having a gradient. Input pixel values can be compared against a dynamically-populated, fixed size pattern entry database to determine whether pattern mode compression or slope-enabled pattern mode compression should be used to compress the image block.

Pattern mode for frame buffer compression

This disclosure describes selection of reference video units to be used for interpolation or extrapolation of a video unit, such as a video frame. A decoder may apply a quality-focused mode to select a reference frame based on quality criteria. The quality criteria may indicate a level of quality likely to be produced by a reference frame. If no reference frames satisfy the quality criteria, interpolation or extrapolation may be disabled. Display of an interpolated or extrapolated frame may be selectively enabled based on a quality analysis. A decoder may apply a resource-focused frame interpolation mode to enable or disable frame interpolation or extrapolation for some frames based on power and quality considerations. In one mode, frame interpolation may be disabled to conserve power when reference frames are not likely to produce satisfactory quality. In another mode, the threshold may be adjustable as a function of power saving requirements.

Reference selection for video interpolation or extrapolation

A video decoder performs a sequential error handling process to detect and conceal errors within a corrupted data segment of video data units. The decoder sequentially decodes a current data unit. Upon detecting an error, the decoder sets an error flag and resynchronizes decoding at the start of the next unit. If the error flag is set, the video decoder identifies the end of the corrupted data segment based on the start of the later unit. The decoder conceals data between the start of the current unit and the end of the corrupted data segment. If the error flag is not set, the decoder may decode the remainder of the current unit and proceed to decode the next available unit without performing error handling and concealment for the current unit. The decoder also may address reference unit mismatches caused by lost video data units.

Video decoder error handling

Described are a system and method to determine the initial luma and chroma phase such that the resulting image after chroma upsampling and scaling has zero phase difference between the luma and chroma components. Particularly, the described method may include receiving a subsampled input image having luma and chroma values. The method may then perform a phase computation of the input image to determine scaling parameters such that phase differences between all color components of an output image are zero. The method may then include performing a combined upscaling and upsampling process on the input image using the scaling parameters to generate an upscaled image with no phase difference from the subsampled image.

Methods and device for efficient resampling and resizing of digital images

Techniques described in this disclosure may implement a bit budget-based scheme that indicates the available bit budget for a current image data block to achieve the target compression. The techniques may continuously update the bit budget after the compression of the current image data block to determine the bit budget for the next image data block.

Image data compression

Certain aspects relate to systems and techniques for compressing image data using mixed mode compression schemes. A mixed mode compression scheme can reduce the amount of data stored in a frame buffer to reduce power costs of an image display system. In some implementations, mixed mode compression can be suitable for compression of pixel blocks having one or two color channels exhibiting a relatively low variation in pixel intensity with the remaining channel or channels exhibiting a relatively high variation. The pixel values in each color channel of an RGB or YCCimage can be analyzed to determine how many channels are a smooth component and how many channels are a variant component, and mixed mode compression can be selected and implemented based on the color channel analysis to adaptively and individually compress the color channels.

Mixed mode for frame buffer compression

The techniques of the disclosure are directed to reducing power consumption in a device through adaptive backlight level (ABL) scaling. The techniques may utilize a temporal approach in implementing the ABL scaling to adjust the backlight level of a display for a current video frame in a sequence of video frames presented on the display. The techniques may include receiving an initial backlight level adjustment for the current video frame and determining whether to adjust the backlight level adjustment for the current video frame based on a historical trend. The techniques may also determine the historical trend of backlight level adjustments between the current video frame and one or more preceding video frames in the sequence.

Temporal control of illumination scaling in a display device

This disclosure describes techniques for region-of-interest (ROI) encoding. In accordance with the techniques described herein, an encoding device may determine a temporal spatial dependency value for a candidate reference video block for inter-coding a current block in a video frame. The encoding device may compare the temporal spatial dependency value to a threshold value and select a coding mode for the current block based on the comparison. A decoding device may receive data defining a ROI as well as the temporal spatial dependency value and decode a video block in the ROI based at least in part on the temporal spatial dependency value. In this manner, the techniques of this disclosure may allow a video content viewer the ability to choose a ROI to watch.

Video encoding with temporally constrained spatial dependency for localized decoding

A method for video processing may include receiving video data units, and compressing the video data units to generate compressed video data units that have a variable size. The method may also include storing the compressed video data units contiguously in a memory in memory segments that have a fixed size, where the size of at least one of the compressed video data units is indivisible by the fixed size of the memory segments, and where a portion of the indivisible compressed video data unit is stored with a portion of another compressed video data unit in one of the memory segments. The method may also include determining data storage information associated with the compressed video data units, and storing the data storage information in the memory. A system may have a video processing architecture designed to support the method.

Video processing architecture

A decoder may apply a resource-focused interpolation mode to enable or disable interpolation or extrapolation of video units, such as frames, based on power and quality considerations. In one mode, interpolation may be disabled to conserve power when reference frames are not likely to produce satisfactory quality. In another mode, the threshold may be adjustable as a function of power saving requirements. This disclosure also describes selection of reference video frames to be used for interpolation or extrapolation of a video frame. A decoder may apply a quality-focused mode to select a reference frame based on quality criteria. The quality criteria may indicate a level of quality likely to be produced by a reference frame. If no reference frames satisfy the quality criteria, interpolation or extrapolation may be disabled. Display of an interpolated or extrapolated frame may be selectively enabled based on a quality analysis of the frame.

Resource-adaptive video interpolation or extrapolation with motion level analysis

Video decoding using temporally constrained spatial dependency

Growing community of inventors

San Diego, CA, United States of America

Chia-Yuan Teng