and commemorative concert highlights. This concert, regarded as a classic by generations of fans, was restored and re-screened in ultra-high definition for the first time 31 years later. The live broadcast was simultaneously conducted on Douyin, Xigua Video, Toutiao, and Xianshi TV, and the cumulative number of viewers that night exceeded 140 million.
"Ultra-clear restoration not only improves the clarity of audio and video," the person in charge of Douyin said that he noticed that this live broadcast also repaired the memory behind the image, and saw "the resonance and resonance of generations of fans because of Beyond's isolation." Sparks."
The youthful memories of several generations have been restored with ultra-clear
Beyond is a rock band founded in 1983. With the rise of Cantonese music, Beyond band 's name has become a cultural imprint of an era. "Beyond Live 1991 Life Contact" was Beyond's first concert held at Hung Hom Stadium . The DVDs subsequently released by PolyGram were almost hard to find in the 1990s. In the 31 years since then, this concert has become the musical enlightenment and youthful memory of generations of fans.
Jiang Su, associate professor at Peking University Law School, is a veteran Beyond fan. He said that Beyond's songs have accompanied him through a long period of time - going to university in the city, getting admitted to graduate school, studying for a doctorate, studying abroad, and eventually becoming a legal scholar, and even I can’t remember how many times I opened this familiar concert video.
The media once commented, "Beyond's music is full of vitality and power. Their music is very melodic and very easy to attract fans. What's even more rare is that their works focus on reality."
After 31 years, the concert at that time was The picture quality, clarity, sound quality and listening experience are not good and need to be further improved to meet the viewing needs of current audiences.
"Don't shy away from the trauma, your dreams will one day be realized, and you will find the world of your dreams." On the night of the live broadcast, when Huang Jiaju's singing sounded in the live broadcast room, the youthful memories of generations of fans were awakened. Netizens wrote Beyond's inspirational lyrics in the comment area to express their nostalgia, and some users said, "After the ultra-clear restoration, I saw Huang Jiaju's subtle expression and the light in his eyes."
Digital technology brings new life to classics
31 years ago, Limited by shooting equipment, storage media and recording equipment technology, the quality of the concert master tapes and various versions of audio and video circulated on the Internet is poor. In order to improve the viewing and listening experience and reproduce the classic Beyond, the Volcano Engine has been restored in terms of image quality and sound quality.
Volcano Engine Multimedia Laboratory introduced that early software and hardware equipment were backward, resulting in problems such as blurry images, texture loss, and noise defects during the production, compression, and transmission of videos. How to deal with quality degradation with complex causes while restoring as much detail as possible, repair the fading of old videos while retaining a retro feel, and adjust the repair effects of portraits of different sizes and postures are the difficulties of this restoration.
"Our goal is to improve the image quality from the aspects of overall picture clarity, restoration of facial features, color brightness, fluency, and aesthetics." In terms of image quality, this restoration uses clarity enhancement, defect repair, and analysis. Algorithms such as regional color brightness enhancement solve problems caused by backward software and hardware equipment in the early stage. The video resolution has been increased from less than 540p to close to 4K level, and the frame rate has been increased from 25fps to 60fps.
In addition, the Volcano Engine Multimedia Laboratory has also developed self-adaptive portrait enhancement algorithms to repair and enhance problems such as facial compression damage, blur, and low resolution. This technology is based on deep learning, which not only eliminates the blurring and compression damage of the entire face, but also further reconstructs the key features of the face in detail. After repair, the beard and pores on the character's face are clearly visible, giving the audience a better visual experience.
In terms of sound quality repair, the Volcano Engine audio technology team uses audio noise reduction, audio super-resolution and loudness algorithms to eliminate noise, improve sound quality, and solve problems such as loudness, noise interference, and insufficient bandwidth.
is different from traditional noise reduction solutions. This noise reduction algorithm implements a compatible AI noise reduction algorithm for music scenes and vocal scenes, suppressing surrounding noise while retaining music and vocals. The audio super-resolution algorithm expands the frequency band of the vocal part in the concert, enriches the high-frequency information, and makes the vocals clearer. It can be seen from the spectrogram that through the processing of the super-resolution module, the high-frequency part of the original audio has been expanded and enhanced.
The sound pickup situation of the concert is different, which will cause the singing sound to be sometimes too small compared to the sound of musical instruments and environmental sounds. The Volcano Engine audio technology team uses the loudness algorithm to first extract the singing part separately, then adjust the loudness of the singing part, and finally mix it, so that The overall vocal sound is more comfortable.
Digital technology is becoming a force driving cultural inheritance. It is understood that in October 2021, Xigua Video and Volcano Engine launched the "Classic Video 4K Restoration Plan". Through technical means, hundreds of classic cartoons will be restored within one year. 71 have been completed so far. Users can enjoy the restored content in Xigua Watch videos and Xianshi TV for free. At the same time, Xigua Video is also open to free restoration cooperation for copyright owners who own precious historical images.
The relevant person in charge of Douyin said that restoring classics is inheritance, and it is also the use of digital technology to maximize the restoration of works and bring new audio-visual experiences. "In the future, we will work with the Volcano Engine to restore more classic images in ultra-high definition and bring new life to classics."
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