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Tencent Architect
Tencent Architect
Aug 26, 2022 · Fundamentals

Tencent's Self‑Developed TXAV1 Video Codec: Architecture, Performance, and Optimization Techniques

Tencent's TXAV1 encoder, a self‑developed AV1 video codec, combines advanced compression‑rate improvements, engineering acceleration, and extensive cloud deployment, achieving up to 78‑334% speedup with minimal quality loss, and includes novel pre‑analysis models, adaptive quantization, and multi‑threading strategies for both video and image applications.

AV1Cloud VideoPre‑analysis
0 likes · 15 min read
Tencent's Self‑Developed TXAV1 Video Codec: Architecture, Performance, and Optimization Techniques
IT Services Circle
IT Services Circle
Jul 12, 2022 · Fundamentals

The Discrete Cosine Transform: History, Theory, and Its Impact on Image and Video Compression

Originating from three largely unknown Indian engineers in the early 1970s, the Discrete Cosine Transform (DCT) became the cornerstone of modern image and video compression standards such as JPEG and MPEG, enabling efficient lossy compression by converting spatial data to frequency components and exploiting human visual perception.

Algorithm HistoryDiscrete Cosine TransformJPEG
0 likes · 11 min read
The Discrete Cosine Transform: History, Theory, and Its Impact on Image and Video Compression
Tencent Cloud Developer
Tencent Cloud Developer
Jun 23, 2020 · Cloud Computing

AV1 Video Codec: Development History, Technical Architecture, and Cloud Encoding Applications

AV1, the royalty‑free video codec created by the Alliance for Open Media and supported by Tencent’s Multimedia Lab, combines advanced block partitioning, intra‑ and inter‑prediction, versatile transforms, sophisticated entropy coding, and loop‑filtering to cut bitrates by roughly 20% for streaming, cloud transcoding, 8K, VR, and medical imaging, while paving the way toward future AV2 and VVC standards.

AOMediaAV1Video Codec
0 likes · 17 min read
AV1 Video Codec: Development History, Technical Architecture, and Cloud Encoding Applications
Tencent Cloud Developer
Tencent Cloud Developer
May 15, 2019 · Fundamentals

FFmpeg Decision Committee Expands: OnVideo CTO Liu Qi Elected as New Member

The FFmpeg decision committee has grown from 22 to 33 members, unanimously electing OnVideo CTO Liu Qi—renowned for adding DASH support, integrating China’s AVS2 standard, and maintaining HLS, DASH, and FLV modules—to help shape future codec development and strengthen ties between the Chinese open‑source community and the FFmpeg project.

FFmpegStreaming MediaVideo Codec
0 likes · 4 min read
FFmpeg Decision Committee Expands: OnVideo CTO Liu Qi Elected as New Member