In addition to highlighting photos, music phones are also an indispensable factor in the new mobile phones released in 2016. In terms of sound effects, in addition to the well-known Hi-Fi, sound effects such as DTS and Dolby Atmos are also very popular. In this issue, we will compare the sound characteristics of HiFi and DTS and the weakness and weakness. When users buy mobile phones that emphasize music performance, they will often be confused about these terms. This evaluation will also sort out some nouns. The user sorts out the clues, because only the mobile phone that suits you is a good mobile phone.
In order to facilitate the comparison between Hi-Fi and DTS, we chose two mobile phones as the comparison objects, namely, the ZTE Tianyi 7 with Hi-Fi function and the Huawei nova with DTS function. First of all, let's take a look at the two mobile phones for Hi-Fi and DTS settings interface.
The DTS logo is displayed in the upper left corner of the Huawei nova music player. After the user plugs in the headset, the DTS sound effect needs to be enabled from the setup menu. The HiFi function of ZTE Tianji 7 needs to be turned on in the setup menu.
Before starting a formal test, let's take a look at what DTS and Hi-Fi mean for music enthusiasts.
What is Hi-Fi?
Hi-Fi means "high fidelity" and is defined as a playback sound that is highly similar to the original sound. Users often hear that smartphone manufacturers often promote Hi-Fi technology for their products. In fact, Hi-Fi is traditionally a field of speakers. However, with the increasing number of mobile Hi-Fi concepts in recent years, users are becoming familiar with the term HiFi. In the final analysis, what is Hi-Fi specifically? To illustrate this problem, you have to first talk about what users generally hear about digital music.
The digital music that everyone heard is basically made in this way. First, the CD-ROM or the computer's CD-ROM drive reads the 0/1 information stored in the CD, and then converts it into a binary file. This file is called digital music. Under normal circumstances, digital music files are relatively large, and it is not convenient to spread on the network. Therefore, there are two forms of lossy compression and lossless compression. The MP3 that users often touch is a kind of lossy compression, which will sound quality. Have a certain impact.
Mobile phone playback is another reverse process. Generally speaking, it refers to a process in which a mobile phone converts lossy or lossless digital music into an analog signal through some hardware, and plays a sound through a microphone of a mobile phone or an external earphone. If the last sound played by a smartphone is highly similar to the original sound created by the music producer, this means Hi-Fi is achieved. One important point to note here is that Hi-Fi is related to sound quality and has nothing to do with the user's hearing. Because the sound quality can be measured with professional equipment, it is more objective, and the hearing is related to the user's personal hearing and preferences, which is more subjective.
How do smartphones implement Hi-Fi?
After finishing the production and playback of more important digital music, Hi-Fi will debut.
In the first step, MP3 files on the phone ROM or TF card or other lossless music files will be decoded first and become a bunch of 0/1 digital signal strings. Since the decoding capabilities of today's smartphones are generally more powerful, and there are also error correction mechanisms, there is no problem with the impact on the sound quality at this stage.
The second step is the processing of digital signals by smart phones. Some mobile phones in this section will have Dolby sound effects and SRS sound effects. These functions will change the sound effects. Therefore, in order to pursue Hi-Fi, these functions cannot be turned on. Of course, the most important thing is the SRC process. The sampling rate of the general CD for audio information is 16bit, 44.1K, of course, there are sampling specifications such as 48K, 96K, 192K, but in the latter process, the sampling specifications must be unified, and the latter process is called SRC. If the processing is not good, Will affect the sound quality.
In the third step, the reason why the user can hear the music is because the sound is an analog signal. This process involves the conversion of the digital signal into an analog signal by the smart phone. Therefore, the digital-to-analog converter is very important. In general, the smartphone manufacturer will Use DAC or codec to achieve.
In the fourth step, the signal converted by the DAC and the codec is generally weak, and the sound of the speaker cannot be directly driven. Therefore, the signal needs to be amplified, which requires a signal amplifier, and it is also likely to be distorted in this process.
The fifth step, of course, is the speaker device. The user needs to listen to the music through the external device of the speaker device or the earphone device. Generally speaking, this part tests the quality of the device interface and the quality of the wire. If it is not very inferior, the sound quality is generally Does not play a fundamental decisive role.
Smartphones that support Hi-Fi generally use separate audio processing chips in the DAC process. Mobile phones that do not support Hi-Fi generally use cheaper codec chips. The Hi-Fi of ZTE Tianji 7 adopts a method of using professional audio processing chips for the DAC link. ZTE Tianji 7 adopts AKM4961 chip and AKM4490 chip. The dual flagship independent chip guarantees pure tone playback and pure tone recording, and also improves transient response and DAC conversion accuracy.
What is DTS?
DTS is actually a company focused on audio effects, founded in 1993, from the original multi-channel audio technology pioneer to one of the must-have audio standards for Blu-ray, and DTS in the digital transmission of movies and other A wide range of applications have been obtained on Internet-related consumer electronics platforms.
How to implement DTS?
Huawei Nova adopts DTS7.1 surround sound technology, which is an internationally renowned audio technology company. Users can experience the cinema-level effect by wearing exclusive headphones. The sound quality of the listening music after DTS can reproduce the true 3D virtual sound field. The sound field effect, more 5.1 channels, 7.1 channels and more channels can bring a rich and realistic surround sound space. In addition, Huawei nova can customize the sound style according to the user's preferences. The DTS7.1 surround sound control software can be preset, and the user can select the surround sound mode and the earphone type.
Music audition test
Listening to music in Hi-Fi mode, ZTE Tianji 7 gives the impression that the bass is thick and the midrange has a strong treble, which is more realistic and restores the original sound music, giving people a pleasant feeling. However, it should be noted that the selected track must be a non-destructive version of the file, because Hi-Fi to distinguish the ordinary 3MB audio file size is difficult to distinguish. To some extent, users who want to hear real Hi-Fi must choose a song with a larger capacity, otherwise Hi-Fi is not very obvious.
There are three main feelings of listening to music under the DTS sound effect. One of the feelings is enhanced compared to the previous one, and the second feeling sound becomes more sturdy. The three senses of the sound become more stereoscopic and the sense of surround is enhanced. Overall, DTS does not require the user to use much music files, and does not care about the lossless audio format. As long as the audio files are perfectly modified, the sound becomes more beautiful and the effect is outstanding.
Movie sound test
In the process of watching movies or other video programs through Hi-Fi, the biggest feeling is that the details of the audio are well presented, and the noisy ambient sound or the hero's dialogue can be clearly distinguished.
The biggest feeling when using DTS to watch movies is that the effect of the sound is more intense. The addition of surround feeling gives the user an immersive feeling, and the audio gives people a feeling of being more honest and powerful.
Summary: After analysis and audition of technical principles, we can easily find that both Hi-Fi and DTS technologies have their own advantages. The biggest feature of DTS is to restore the sound and maximize the original sound. In terms of use effect, ZTE Tianji 7 can keep the sound delicate and maximize the effect in the lossless audio file format. Huawei Nova's DTS technology focuses on surround sound. The actual effect not only enhances the thickness of the sound, but also enhances the stereoscopic effect of the sound, and does not require the audio file to be lossless. Overall, the two have their own advantages and advantages, users can choose according to their own preferences.
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