Although the various "traffic packages" launched by operators have given them "freedom to follow dramas" to a certain extent, they may receive SMS reminders of "traffic emergency" after brushing several episodes of high-definition hit dramas on the streaming media platform. But if the definition is reduced, the picture will be blurred and the immersion will be less.
After all, "it's cool to chase a drama for a while, but it's always cool to chase a high-definition drama."
In order to eradicate the "difficult choice" of "chasing the Party", Tao Chang gave the video encoder a "powerful medicine" which directly affected the image quality and traffic consumption. With the support of more perfect algorithm, the fastest coding speed of QAV 1 encoder developed by Tao Chang is increased by 50 times, and the compression efficiency is increased by more than 20% compared with that of 265 encoder under the same computing resources. This means that when users watch the 4K video compressed by QAV 1 encoder online, they can save more than 20% traffic without affecting the video quality.
In other words, with the same traffic consumption, users can still catch up with 1 set, and appropriately "increase the amount without increasing the price".
After a play, you can "make a steady profit without losing money." Is the function of video encoder so unique? Let's reveal a secret today ~
"There are so many doorways to compress a video."
I believe everyone has this experience. When the 4G signal is poor, it is easy to watch the video, and the more you drag the progress bar, the slower it loads. In fact, this is because the current network speed can't move the video bit rate, and it will consume unnecessary traffic. Therefore, for a better playback experience, ultra-high-definition video files generally need to be "slimmed down" before transmission.
In the face of the "both" viewing needs of this generation of users, we can "slim down" the video without sacrificing the image quality, and at the same time, we should also consider playing without jamming and saving traffic ... This requires a video encoder to show its magical power. Simply put, the so-called video coding refers to the way to convert the original video format file into another video format file that is conducive to transmission through compression technology. According to different coding standards, the video encoder "removes redundancy" from the original video material.
But this "slimming" process is not simple. This requires a powerful algorithm scheme and an understanding of how to realize complex coding standards better and faster. At present, the mainstream coding formats are VPx(VP8, VP9), H.26x(H.264, H.265), AVS(AVS 1.0, AVS2.0) and so on. AV 1 chosen by Tao Chang is an open source copyright-free video coding format. According to a report from Streaming Media Oriental, the average bit rate of AV 1 codec is the lowest among these standards under the same picture quality.
"watching HD in the stream" is not far from us.
Tao Chang's exploration and innovation in the field of audio-visual technology has never stopped. Iqiyi makes full use of cutting-edge deep learning technology to optimize rate control and mode selection, and has done a lot of tedious and basic instruction optimization work to improve the processing efficiency of QAV 1. Compared with last year's version, the fastest speed of iQiyi QAV 1 encoder has increased by nearly 50 times this year. This fully shows that QAV 1 greatly reduces the computational complexity of AV 1, improves the coding speed, and has the ability to mass-produce AV 1 format content.
In fact, as early as 2020, iQiyi took the lead in launching AV 1 video coding format on Android mobile terminal and PC Web terminal. At present, the QAV 1 video encoder has reached the same coding speed as the ultra-fast x265, which is the most widely used in the industry. Nowadays, with the great improvement of performance, QAV 1 can be applied to all scenes where x265 is applicable, and more users will get more possibilities of "watching HD while saving stream" in scenes including offline video download and online live broadcast.
At the same time, AV 1 coding will have a better chance of popularization only if more hardware provides computing support. Since 2020, hardware manufacturers including Intel, AMD, NVIDIA, MediaTek and Samsung have joined the ranks of AV 1 hardware decoders.
In the future, iQiyi will continue to help upgrade audio-visual technical standards, strengthen cooperation with industry enterprises, chip manufacturers, mobile phone manufacturers and other parties, promote the expansion of AV 1 to more hardware devices, and create a high-quality entertainment experience for users.