Overview
Using Dolby Laboratory MLP lossless compression (MLP Lossless?) technology, DVD-AUDIO CD can accommodate up to 6 channel 24-bit / 96kHz sound signals , Includes a separate bass channel. Compared to the CD sound signal of the two channels 16-bit / 44.1 kHz, the DVD-AUDIO disc can choose to record 24-bit / 192khz sound signals, and this specification is in sound on the stereo recording. Quality meets or transcends any of the previous sound formats.
DVD-AUDIO is an extension of a widely popular DVD disc format that is distinguished in that it can transmit a new standard high quality audio data that cannot be carried by all previous audio carrier formats. DVD-AUDIO's most striking feature is its multi-channel audio capability, which has proven to be the best choice for automotive entertainment equipment. The same DVD-Audio has many high value-of-value multimedia features that are also unmatched by the CD disc.
DVD-AUDIO code rate is it? Ordinary 16BITS / 44.1 kHz Cd code rate is 2 × 44.1 × 16 = 1411.2kbps. DVD-AUDIO provides full-band 6-channel 24BITS and a sample rate of up to 96 kHz, which is 6 × 24 × 96 = 13824 kbps = 13.5Mbps, which is obviously several times in CD.
Advantages
DVD-AUDIO and CD are indeed different compared to the quality, and the effect is very obvious. With DVD-AUDIO, we have the opportunity to provide the consumer to provide the same quality of the audio-tape quality when playback. It can capture every detail of the artist performance and restore through intimate, natural tone, which is unable to achieve CD technology.
DVD-AUDIO with MLP lossless compression technology is the ultimate audio format, has a expectation of the pursuit of audio enthusiasts to high quality sound effects and the convenience and compatibility of the use of ordinary audiences. With DVD-AUDIO, anyone can appreciate the use of DVD players, more dynamic ranges, and have a deeper sound field, and record music is more powerful.
In addition to music, image information can also be added on the DVD-AUDIO disc. Photos, lyrics, annotations, or static images, animations, and text combinations can be placed in the disc. Producers and artists can also add narration as they do on the DVD-VIDEO disc. In addition, the video area of the DVD-AUDIO CD can be placed in full dynamic video image signals and accompanied by the Dolby Digital sound signal of up to 5.1 channels.
Development Recent status
Although DVD-Audio is dominated by Audio, this is not to say it completely excluded video signals. But its remaining space will definitely not cover a whole concert or a movie. Some said that the initially appeared print may include a 24/96 two-channel mix, a 5.1-channel mix, and a less long Musicc Video. The most eye-catching is that the DVD forum uses Meridian's latest audio digital compression technology, called MLP (Meridian Lossless Packing), which uses 2: 1 compression ratio. On the DVD-Audio record, 24/96 two channels can be inevitable, and 5.1 part If MLP is used, it becomes the best multi-channel mode. For all, the 20bit recordings of DTS have been 3: 1 compression ratio, which is temporarily in this field, because the Dolby Digital used in the four thousand DVD-Video used in the market uses 12: 1 compression ratio, So when DVD-AUDIO uses MLP, its 5.1 channel will become new standards.
In addition, DVD-Audio has a lot of flexible places, such as they can play different bit numbers, 16bit, 20bit and 24bit, as well as different sampling frequencies, 48kHz, 96kHz, 192kHz, 44.1KHz, 88.2kHz and 176.4kHz. Two channels and coexisting 5.1 sound fatigue can provide 74 minutes of recording. Image can provide some short video clips, recording content description text (this can save the text or additional brochure to be visually printed with a magnifying glass in the record enclosure), matching the mirror screen, sync lyrics and tame, and even Combo-related URL (when playing with a computer. These are the advantages of DVD-Audio.
But there are some questions about the prospects of DVD-Audio in the cappeeder circle, of course we can only put them It is a rumor, but I know, I don't prevent it.
First of all, the DVD-VIDEO player can only play the video portion of the DVD-Audio print, in other words, if you don't buy one DVD-AUDIO player, the broadcast will still be 16bit / 48kHz effect. Of course, there will be compatible machines in the future, but it is based on the day of the Japanese manufacturer to produce such compatible machines. After two years, then, it is required to require higher requirements. Quality Hi End Manufacturers take longer because they can only order a movement to the Japanese OEM manufacturers.
also rumors say that in order to stop piracy, DVD-Audio will not have digital output. I hope this is really rumored. In fact, everyone knows, a separate, Outboard's dedicated DAC, the effect will definitely be better, although the user wants to spend more money. However, even if there is a digital output interface, the situation is not much, this is Because the current coaxial SPDIF interface system, only 20bit / kHz signal can only be able to have a function of transmitting the real 24/96 digital signal, only FireWire mode, today's most expensive DAC has no firewire interface, then How to change when transferring 24bit 192kHz.
Speaking of finally, although the technical advantage of 24bit 192kHz is unquestionable, DVD-Audio's biggest obstacles are subsequent compatibility (Backward Compatibility). The financial valve will only put your eyes in the market. How much percentage of enthusiasts have a burning friend? Their support will be sufficient to promote a revolution? When the general consumer does not have strong complaints of Dolby Digital and DTS, Dolby Digital or when using MLP, smart readers, how will you believe how we will balance technology and market?
Maintenance Maintenance
One is shockproof. Although some brands DVD-AUDIO charm shockproof performance, but most DVD-Audio machines should not be used in vibration, otherwise they will affect their laser scanning precision, so that the audio quality is seriously affected. . Therefore, it is not appropriate to move, more uncomfortable and impacts when using the DVD-Audio machine. It should also be easily put in hand in handling, so as not to affect the inner components.
2 is dustproof. DVD-AUDIO machine components are highly precisely, and if there is dust into the machine, it will make it not working properly, or even damage to damage. Therefore, the DVD-AUDIO machine should be placed in a clean environment and take corresponding dustproof measures. During the dust removal, it should be carried out in a stop-blown or vacuum cleaner, do not remove dust removal.
three is cold. In winter, in spring, in spring, if the DVD-AUDIO machine is placed at the door, the window, etc. will inevitably cause the DVD-Audio machine to be cold stimulating. This will cause the DVD-Audio machine to be able to use and accelerate the aging of the Emissivity by "cold".
four is heat-resistant. DVD-Audio machine is afraid of cold and fear of heat. It is best to be placed in a cool and ventilated, should not be protected from direct sunlight and near the stove, heater. Do not place the DVD-AUDIO machine on the amplifier, the regulator, but also to avoid placing the carpet, sofa and mattress, so as not to prevent heat dissipation of the machine.
5 is moisture. DVD-AUDIO is easy to make optical lenses blur, causing laser beams to pick up signals normally. When climate is humid or hot and hot, it will cause dew or fog, and if the use should be preheated for a few minutes, then place the disc playback. It is usually kept dry around the machine, and it should be turned on frequently in the rain, such as Mei Yuzhen, should be turned to drive away moisture. If the DVD-Audio machine is often wet, it will make the part rust even the machine fails.