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Concepts

Updated on 2024-08-05 GMT+08:00

H.264

H.264 or MPEG-4 Part 10, a video compression standard developed by the ITU-T Video Coding Experts Group (VCEG) and ISO/IEC JTC1 Moving Picture Experts Group (MPEG).

H.265

H.265 is a video compression standard, designed as a successor to H.264. Based on the video coding standard H.264, H.265 keeps some of the original technologies, while improves some relevant techniques. H.265 adopts the advanced techniques to improve the bit-stream, promote the coding quality, and better the relationship between time delay and algorithm complexity, to achieve best possible optimization. H.264 can transmit SD (resolution lower than 1280 x 720) digital images at a rate lower than 1 Mbit/s, whereas H.265 can transmit standard HD (resolution of 1280 x 720) audio and video at a rate of 1 Mbit/s to 2 Mbit/s.

Low-Bitrate HD

Based on the human visual system model and Huawei's transcoding technology, Live analyzes each scenario, action, content, and texture in a video to deliver lower bitrate while keeping the bandwidth costs down but without compromising the video quality.

Weak Network

The QoS of a weak network is not stable.

95th Percentile Bandwidth

A billing option. Within a calendar month, the bandwidth is measured and recorded every 5 minutes on each valid day. At the end of the month, the records are sorted from the highest to the lowest, and the top 5% of the recorded bandwidth values are thrown away. Then the highest bandwidth value in the remaining records is the billable bandwidth of the month.

Upscaling

Low-resolution videos are transcoded to high-resolution ones.

Standard Transcoding

Process of compressing the bitrate, adjusting the resolution, converting the packaging format, and adding watermarks based on standard video encoding and decoding technologies

One-in Multiple-out

It is a transcoding method. That is, a video file is transcoded into video files of multiple resolutions and bitrates to meet the playback requirements of different devices and different network speeds.

Image Enhancement

The combination of the traditional super-resolution algorithm and AI-powered image enhancement algorithm converts 2K videos to 4K videos, repairs damaged images, and improves the image quality of existing videos.

Offline Transcoding

A video file is transcoded to one or more video files with different bitrates to meet different network bandwidth and device requirements. Different from real-time transcoding, offline transcoding is started only after a complete video file is obtained.

Container

Video and audio streams that have been encoded and compressed are stored in a file according to certain format specifications. Common protocols include MP4, FLV, and HLS.

Frame Rate

A measurement unit of the number of frames displayed in a video per unit time. The measurement unit is frames per second (FPS).

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