An example device for retrieving media data, the device comprising: a memory configured to store scene data and image data; and one or more processors implemented in circuitry and configured to: receive data for a bitstream indicating that the bitstream includes one or more overlay images, the overlay images comprising either a single static image to be presented with scene data that remains constant while being presented frame-by-frame with frames of the scene data or an image sequence that repeats with a regular periodicity while being presented frame-by-frame with the frames of the scene data; receive the one or more overlay images from the bitstream; receive the scene data including one or more scene images; and present the scene images and the overlay images.

A video transmission method includes: A first media gateway receives an uplink media packet sent by a first terminal, where the uplink media packet carries information indicating that the first terminal supports an uplink-downlink resolution asymmetry capability and an uplink media stream of a first resolution of the first terminal. The first media gateway sends a first downlink media packet to the first terminal, where the first downlink media packet carries a downlink media stream of a second resolution of the first terminal, and the first resolution is different from the second resolution. The solution is applicable to the following case: In a video call process, a terminal that supports different resolutions in a sending direction and a receiving direction can lower a resolution based on channel quality to deliver a video packet, and can raise a resolution when network resources are sufficient.

This application relates to the field of communications technologies, and in particular, to an auxiliary-link-based call compensation system and apparatus, and chip. The system includes: a first terminal, a second terminal, and a core network device. The first terminal and the second terminal establish a primary link in response to a dialing operation entered by a user. The first terminal and the second terminal establish at least one auxiliary link in response to an auxiliary link establishment condition. The first terminal transmits call data packets with the second terminal by using the primary link and the at least one auxiliary link. The first terminal and/or the second terminal performs post-processing and playing on the call data packets received by using the primary link and the at least one auxiliary link.

A method and apparatus for outputting a supplementary content from a WFD is disclosed. The method for outputting a supplementary content from a WFD may comprise the steps of: after a WFD source is connected to a WFD, transmitting, by the WFD source, an RTSP parameter request message on the basis of an RTSP to a WFD sink in order to perform a capability negotiation procedure with the WFD sink; transmitting, by the WFD source, an RTSP parameter response message to the WFD sink in response to the RTSP parameter request message; and after performing the capability negotiation procedure, transmitting, by the WFD source, a transmission stream, obtained by overlapping and multiplexing a video stream including video data having a first resolution and a supplementary stream including supplementary data having a second resolution, to the WFD sink, wherein a WFD discovery response frame includes second resolution-related information for determining the second resolution, and an RTSP parameter response frame includes the second resolution-related information.

A method of processing transmission of a broadcast signal includes generating broadcast data for one or more broadcast services, generating first level signaling information including information for describing attribute for the one or more broadcast services, generating second level signaling information including information for listing the one or more broadcast services, generating link layer packets including the encoded broadcast data, the first level signaling information, and the second level signaling information, and generating a broadcast signal including the generated link layer packets.

Wireless transport of multiple service versions of a transport framework. First and second information may be processed for transmission, respectively, according to first and second service versions of a transport framework. The first and second information may be encoded using a first type of error correction coding; after processing, the processed first information may include error correction coding according to the first type of error correction coding, while the processed second information may remain uncoded according to the first type of error correction coding. Control information may be generated indicating that the second information remains uncoded according to the first type of error correction coding, which may signal to receivers that the second information is processed according to the second service version of the transport framework. Packets including the processed first information, the processed second information, and the control information may be generated and transmitted in a wireless manner.

Wireless transport of multiple service versions of a transport framework. First and second information may be processed for transmission, respectively, according to first and second service versions of a transport framework. The first and second information may be encoded using a first type of error correction coding; after processing, the processed first information may include error correction coding according to the first type of error correction coding, while the processed second information may remain uncoded according to the first type of error correction coding. Control information may be generated indicating that the second information remains uncoded according to the first type of error correction coding, which may signal to receivers that the second information is processed according to the second service version of the transport framework. Packets including the processed first information, the processed second information, and the control information may be generated and transmitted in a wireless manner.

Embodiments of the present disclosure relate to workload-based dynamic throttling of video processing functions. Systems and methods are disclosed that dynamically throttle video processing and/or streaming based on a workload. Live video is captured from one or more sources (e.g., cameras) and stored. The video is then provided to a video processing engine and a video streaming engine. The video processing engine may perform one or more operations such as object detection, object tracking, and object classification to produce characterization data (e.g., bounding boxes, object trajectories, alerts, object labels, object counts, boundary crossings, intersection highlighting, etc.). System resource usage and performance of the video processing and streaming are monitored to produce workload data (e.g., metrics). Based on the policies and the workload data, the video streaming and/or processing is dynamically reconfigured by adjusting parameters provided to the video streaming and processing engines.

Embodiments of the present disclosure relate to workload-based dynamic throttling of video processing functions. Systems and methods are disclosed that dynamically throttle video processing and/or streaming based on a workload. Live video is captured from one or more sources (e.g., cameras) and stored. The video is then provided to a video processing engine and a video streaming engine. The video processing engine may perform one or more operations such as object detection, object tracking, and object classification to produce characterization data (e.g., bounding boxes, object trajectories, alerts, object labels, object counts, boundary crossings, intersection highlighting, etc.). System resource usage and performance of the video processing and streaming are monitored to produce workload data (e.g., metrics). Based on the policies and the workload data, the video streaming and/or processing is dynamically reconfigured by adjusting parameters provided to the video streaming and processing engines.

The surveillance video playback method includes receiving, by a video surveillance management device, a surveillance video browsing request from a client device, and performing, according to the request, authentication on a user that sends the surveillance video browsing request using the client device; if the user that sends the surveillance video browsing request has permission to view collected data, sending a first link address corresponding to the user request to the client device; and sending video data and the collected data to the client device according to a data request that carries the first link address and is returned by the client device, so that the client device can superimpose the collected data on the video data and then play them.