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In the past, Dolby AudioTM was basically in some movies with Dolby 5.1-channel playback, and this time it was finally possible to experience Dolby audio on smart devices, although the effect and the feeling in the cinema There was a difference between what came to the home or through DVD playback, but it was the first time I had Dolby Sound on the phone. The same piece of video or music played back with Dolby Panorama sound, and the effect was a bit of a surprise.
The mobile phone that was experienced this time was Phab2 Plus, a large-screen smartphone with Lenovo's panoramic sound technology.
Lenovo PHAB2 Plus Netcom Mobile Tablet 6.44 inches (8-core 3G/32G dual camera) Magic Gold 1399 yuan Jingdong direct link 
According to relevant data, Lenovo's three mobile phones Phab2, Phab2 Plus and Phab 2 Pro are equipped with Dolby audio capture and Dolby Surround sound technology.
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Here's a brief explanation: The main content of this article is the Dolby Audio Capture and Dolby Atmos experience on the Phon2 Plus smartphone. And not the average mobile experience sharing.
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Before sharing experience with you, let's briefly introduce the concepts of Dolby Audio Capture and Dolby Atmos.
Dolby Audio Capture:
This concept of this article can be understood as the use of the three built-in microphones on the Phab 2 Plus of the Lenovo smartphone to use spatial acquisition technology to determine the direction of the sound, using the microphones placed on the rear, left, and right sides. Sound from different directions and generates a 5.1 audio signal.
After acquisition, these 5.1 audio signals are encoded as Dolby Digital Plus high quality surround sound streams, while optimizing loudness and dynamic range, creating a high-quality 384 kbps stream for 5.1 surround sound playback. The audio signal, while encoded as AAC 2.0, can be played on devices that do not support Dolby Audio.
Dolby Atmos:
It breaks through the notion of 5.1 and 7.1 channels in the traditional sense. It introduces the concept of sound objects. It can combine video or video content to present dynamic sound playback, creating far and near sound effects, including the top sound, to surround the sound field. , Show more rich sound details to create a natural and realistic sound field, through the vivid sensory experience, the audience will be brought into the film's story, combined with natural and real sound effects to provide users with a powerful new listening experience.
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After the introduction of the concept, after all, this is just Dolby Audio Capture with Dolby Atmos, which is on the phone. There is definitely a difference in the cinema. However, if you compare smartphones that do not have these two technologies, the audiovisual experience with Dolby Audio Capture and Dolby Atmos will be even greater when recording or playing video at the same time. Realistic and vivid.
How to choose Dolby sound?
Take the Phab2 Plus mobile phone as an example. Here is a simple explanation of how to start Dolby on your mobile phone.
In the "Tools" directory and swipe to the page with the "Dolby" option, click to enter
After entering, you will see the Dolby Atmos logo
When you turn off Dolby Panorama sound, the interface is as follows:
When Dolby Panorama Sound is turned on, the interface is as follows:
The above is the interface with no headphones inserted.
The third option "Surround Virtualizer" will open automatically when the headset is plugged in
Users can even manually adjust the equalizer according to their listening orientation.
In addition, you can use the drop-down shortcut menu to directly select the Dolby icon inside and open the Dolby Panorama sound function.
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How to record 5.1 surround sound video with Dolby Audio Capture?
In fact, it is very simple, you only need to open the "camera" option on Phab2 Plus, then select the video recording, without special settings, just put the phone horizontal screen, Dolby 5.1 recording mode will automatically open. All recorded videos have crystal clear 5.1 surround sound.
Case (1) Recording Outdoor Video
Record saved video, use Phab2 Plus playback, you can choose whether to open Dolby mode, if you turn off Dolby sound, the sound in the video will become relatively flat, such as continue to open Dolby sound, the sound within the video appears More three-dimensional, more space sense.
As shown in the picture above, a video was recorded on the balcony of the house, and the sound of the horns of the passing vehicles on the street, the cries of the hawkers in the alley, and the noise generated by the corner shovels were collected through Dolby sound collection. Moreover, the direction of the sound and the distance between the images are basically clear, presenting a vivid, three-dimensional picture. Because the video is recorded facing the outdoors, the sense of space created by the sound is relatively open and stretched.
Case (2) Recording indoor video
The above video was recorded in the Starbucks coffee shop. Indoor recorded video, the presented sound field space will change with the changes of the environment, relative to outdoor recording, the sense of space will be relatively small. But the effect of the video is still good on the spot. In the café environment, the children's cries, the cashier's waiter talks with the customers to place orders, the footsteps (from far and near), the young people's chats, and the corner customers move in chairs. The voices can be vividly recorded into the video, and you seem to be in the scene. Moreover, the distance between the spatial location of each sounding point and the difference in sound strength can be clearly distinguished.
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In addition to the recorded video, if you play video on Dolby Atmos mobile phones, what will happen?
Just a video demo inside the phone opens this video demo:
As described in the subtitles, Dolby's panoramic sound technology brings a natural, open sound field, stunning low frequencies, and a vivid sense of field. You can feel the freshness of the natural world. Before the thunderstorm, the thunderous sound of thunder and thunder, the sound of water falling from the far and near raindrops, the sound of flowing water in the depths of the forest, the cry of insects and so on. All these sounds coming from nature are all vivid and three-dimensional. Open the video, you will have an immersive feeling, just as you feel the arrival of thunderstorms, watching the rain sprinkled on the earth, breathing fresh muddy soil, walking in the depths of the forest worms and birds sing. This is the natural, clear, and space-like experience that Dolby Panorama sound brings.
In addition to the video in the machine, during the experience, it also tried to play online movies. It was found that the difference between opening Dolby sound and closing Dolby sound could still be clearly distinguished. The front has always been a demonstration with a mobile phone Speaker. When watching online video, try to experience it with headphones. Found that after opening the Dolby sound effect, the left and right surround sound effect is more obvious, the vocal part is more prominent, the strength of the sound, the far and near images are more three-dimensional. After closing, the sound is relatively flat, leaving only the horizontal width, which is not as profound as when the Dolby sound is turned on.
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Try video playback, and everyone will ask, what about listening to songs on mobile phones equipped with Dolby Sound?
Next, share with you what changes have taken place in order to start playing Dolby audio.
First adjust the settings and turn on Dolby sound.
I listened to Faye Wong’s classic: <Convention>, selected from the album “Toy.â€
Headphones used: HA-FW001 (JVC)
Open the Dolby sound effect state, the music prelude section, the rain, the bell, the sound of the car passing from afar, etc., and the images are clear, three-dimensional and hierarchical. After entering the song, the vocals are more closely related and the instruments and vocals can be clearly separated. After the Dolby sound was turned off, the spatial distribution of vocals and instruments changed, the vocal distance was far longer than when the sound was turned on, the vocals were less prominent, and the bass became relatively flat. The sense of space in the entire voice has declined, and the depth and level are not as good as those of Dolby.
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Conclusion:
It's nice to have this opportunity to experience Dolby sound on your smartphone. Through this experience, both Dolby Audio Capture and Dolby Audio with Dolby Atmos have had personal contact and preliminary understanding.
Through the above-mentioned series of tests, experience and feel the smart phone equipped with Dolby Audio Capture and Dolby Atmos technology, you can really get a more realistic feeling when recording and playing video. , as well as a more encompassing, vivid listening experience.
Liu Jiaming
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