China News Service, Beijing, April 2 (Reporter Ying Ni) "Spring should be very good, if you are still there - Leslie Cheung's 2000 "Passion and Love" concert ultra-clear restoration version" on the evening of the 1st online on multiple online platforms First live broadcast.

During the two-hour broadcast, more than 17 million people watched, not only making people feel Leslie Cheung's style again, but also making more Rong confused.

  On April 1st every year, many fans of Rong will express their remembrance in various forms such as sharing Leslie Cheung's works before his death.

Limited by the storage media of shooting equipment and video materials at that time, the quality of the video is generally poor in the 21-year master tape collected by Polygram and the concert version of "Passion" circulating on the Internet.

Thanks to the blessing of digital restoration technology, this "symbol of the times" that has been sealed for more than 21 years has been unlocked for the first time.

Photo courtesy of Tencent Cloud Multimedia Lab before and after repair

  The "Passion" concert was Leslie Cheung's classic swan song during his lifetime. He personally served as the artistic director, and the well-known fashion designer Jean Paul Gaultier was responsible for the costume design.

The whole concert, in terms of artistic conception, plot repertoire arrangement, and the series of "Angel to Devil", were all pioneered at that time. Among them, the six costumes from angel to devil caused great controversy for a while.

The American "Time" magazine commented: "It has reached the pinnacle of passion and fashion creativity." Leslie Cheung also said that this was the concert he was most satisfied with.

  "Keep the warmest side of the world, and the vast sea of ​​people will stay warm through the coldest day..." In the live broadcast room of the concert that night, many fans put Leslie Cheung's classic lyrics on the public screen to express their nostalgia for Leslie Cheung and his classic works. .

Some users left a message saying that the details of Leslie Cheung's face, stage and other details are clearly visible in the super-clear repaired version, and there is a feeling of dreaming back to 2000.

  Leslie Cheung is no longer a simple name, but a cultural imprint of an era.

With the rise of Cantonese pop music, PolyGram has witnessed the golden age of Hong Kong's record industry, and Leslie Cheung is one of the most influential singers under PolyGram.

  "As a king-level singer, Leslie Cheung can achieve self-breakthrough in concerts and face himself sincerely, which is one of the reasons why he cannot be replaced in the Chinese music scene." Music critic Ding Huifeng said, ""Enthusiasm "A lot of the content shown in the concert is very advanced, and even in 2022, looking back, I will still feel that this concert is very remarkable."

Photo courtesy of Tencent Cloud Multimedia Lab before and after repair

  In order to reproduce the classics, we use technological means to restore ancient images.

"With the accumulation of technologies such as the repair engine in the laboratory, the clarity of the concert video can be restored to the greatest extent. However, for the problems of fast color and screen switching in the concert video, and the low definition of video materials, how to do it? It was a big challenge for the team to restore the old as it was, and bring the audience an immersive experience." Xia Zhen, an expert and researcher at Tencent Cloud Multimedia Lab, admitted that he was rather uneasy at the time.

  According to reports, the image quality repair technology in this ultra-clear repair version combines intelligent analysis information and uses a variety of artificial intelligence repair algorithms to train and optimize for old movie scenes, and can repair a variety of factors that damage image quality content. , mainly to fix common vertical lines, snowflakes, noise, compression distortion, jitter and other problems in old films.

The "face inpainting" model is based on the self-developed face inpainting model. It uses face detection, face inpainting and fusion modules to migrate the image inpainting to the video process and add inter-frame stability processing to solve the stability of face detection. Optimize the multi-angle face effect to solve the complex scene problems encountered by dynamic faces in videos.

  In order to create a "face-to-face" effect, the laboratory team also made special algorithm tuning on the details of Leslie Cheung's concert eyes.

A still image of Leslie Cheung in the center of the stage was captured from the repaired video. After zooming in, it seemed that the outline of the image refracted by the stage could be seen through his eyes.

  In fact, behind the widespread concern about the live broadcast of Leslie Cheung's "Passion" concert, the ultra-high-definition repaired version reflects that there are a large number of classic film and television dramas and cultural images in China that need to be repaired urgently.

At present, digital technology is becoming an important driving force for driving cultural heritage and promoting the development of the ultra-high-definition video industry.

The "Ultra HD Video Industry Development Action Plan" jointly issued by the Ministry of Industry and Information Technology, the State Administration of Radio and Television, and the Central Radio and Television Station clearly stated that by 2022, the total size of the ultra-high-definition video industry will exceed 4 trillion yuan, and the production of ultra-high-definition content will exceed 4 trillion yuan every year. 30,000 hours.

However, on the production side of ultra-high-definition content, there are pain points such as high cost and low efficiency of ultra-high-definition content production, classic old movies and video conversion to high-definition, which have become key factors restricting the development of the industry.

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