Apple Inc.

Vikrant Kasarabada

Gennadiy Shekhtman

Gregory R Chapman

Haitao Guo

Chendi Zhang

Elena Leyfman

Hsi-Jung Wu

Xiaosong Zhou

Beibei Wang

Giovanni M Agnoli

Dazhong Zhang

Christopher M Garrido

John Samuel Bushell

Karthick Santhanam

Ming Jin

Hang Yuan

Eric L Chien

Peter Chou

Xiaohua Yang

Peikang Song

Albert E Keinath

David R Conrad

Gurtej Singh Chandok

Davide Concion

Bess C Chan

Vaidyanath Mani

Mohammad A Shah

Siladitya Bhattacharya

Virata Yindeeyoungyeon

Tu K Nguyen

Giribalan Gopalan

Shardul Oza

Christopher B Fleizach

The present disclosure generally relates to communicating between computer systems, and more specifically to techniques for communicating user interface content.

Receiver initiated mirroring session

In some implementations, a first device can record a display screen of a second device remotely. For example, the first device (e.g., a remote computing device) can receive information identifying other computing devices on a network. The first device can receive a selection of one of the other computing devices (e.g., the second device) and send a message to the second device to initiate a recording of the display screen of the second device. In response to receiving the message, the second device can record video frames of images presented on the display of the second device. The second device can send the video frames to the first device for display and/or storage. While recording the images presented on the display screen, the second device can present indicia on the display screen of the second device indicating that a screen recording is in progress.

Screen recording from a remote device

Techniques are disclosed for coding video data in which frames from a video source are partitioned into a plurality of tiles of common size, and the tiles are coded as a virtual video sequence according to motion-compensated prediction, each tile treated as having respective temporal location of the virtual video sequence. The coding scheme permits relative allocation of coding resources to tiles that are likely to have greater significance in a video coding session, which may lead to certain tiles that have low complexity or low motion content to be skipped during coding of the tiles for select source frames. Moreover, coding of the tiles may be ordered to achieve low coding latencies during a coding session.

Efficient coding of source video sequences partitioned into tiles

In some implementations, a computing device can notify a media application when a screen recording may be in progress. For example, the computing device can be configured to send media content provided by the media application for presentation on the display of the computing device to a second destination (e.g., a file, a remote playback device, a remote recording device, etc.) that may result in a recording of the display screen of the computing device. To allow the media application an opportunity to protect the media content from unauthorized recording, the computing device can notify the media application that the media content being sent to the second destination may be recorded. In response to receiving the notification, the media application can modify the presentation of the media content to prevent or downgrade any recording that may be performed.

Notifying applications of screen recording

The decode resolution of a video signal can be varied during decoding by decoding a first portion of a video signal at a first resolution; determining a second resolution, different from the first resolution, at which a second portion of the video signal is to be decoded; adjusting one or more reference pictures associated with the video signal to correspond to the second resolution; and decoding the second portion of the video signal at the second resolution. The second resolution, at which the second portion of the video signal is decoded, can be selected from a plurality of predetermined decoding resolutions in response to the detection of a predetermined condition or in response to an input received from a user. Additionally, one or more reference pictures associated with the video signal can be up-sampled or down-sampled in at least one of the horizontal direction and the vertical direction.

Switching decode resolution during video decoding

A video encoder identifies scene changes during the encoding of video sequences based on the distribution of macroblock types within each image. Once an image is identified as a scene change, control information is sent to a quantizer to adjust the quantization of the image to improve image quality. The image quantization is improved without changing the frame or picture type of the image within its group of pictures. To improve the image quality, the quantizer can directly or indirectly change the quantization parameter used to quantize the DCT coefficients for the image.

Scene change identification during encoding of compressed video

Growing community of inventors

Los Altos, CA, United States of America

Vikrant Kasarabada