Showing posts with label blu-ray disc. Show all posts
Showing posts with label blu-ray disc. Show all posts

Monday, August 29, 2016

How to keep the original DTS HD-MA audio track from Blu-ray disc

Summary: DTS-HD has pretty much become the standard audio track of most Blu-ray discs. That is why we will try to explain how it works, and of course, how you can rip it, in this article. 


How to rip Blu-ray to DTS-HD Master Audio 

180px-DTS-HD-MA.svgDTS-HD Master Audio or just DTS-HD in many descriptions is a lossless audio codec by Digital Theater System. It replaces the old DTS audio (actually it extends it) and its main goal is to allow a bit-to-bit representation of the original Blu-ray movie's studio master soundtrack. If you are unaware with the lossless term, it is a compression method that allows you to have the exact original data from the compressed data after extraction, in contrast to lossy formats which only allows an approximation of the original blu-ray data to be reconstructed. An example of a lossy audio format is MP3, while another lossless audio format is FLAC.

The DTS-HD Core and how the format working 

As you can read in detail in the DTS-HD white paper the encoding process of a DTS-HD track in simple terms is the following: first the Core, which is lossy format, similar to the old DTS is being created. Then the Core is compared to the original audio and any parts found missing are being added an an extra "residual" stream. Then both streams are used to create the final DTS-HD MA track. That way in older decoders that only support the old DTS format, you just listen to the Core stream. In decoders that support DTS-HD, both the streams are being played in the same time giving you lossless original sound quality.

What do you need to rip Blu-ray movies 

First of all I assume you have at least a 5.1 sound system, otherwise you should just downmix to stereo. Now since there are only a few software decoders for DTS-HD and these at insane prices we can pretty much assume the following scenarios:

  • If you have bought a software decoder or have a decoder that supports DTS-HD and you pass-through the audio through HDMI or Optical, just create an mkv file and maintain the original audio track from the Blu-ray. 
  • If you decode through your PC or you passthrough to a decoder that doesn't support DTS-HD you don't need both streams. Even if you keep the whole track, you will only listen to the Core, so just keep that and remove the HD audio. For instance, you might be able to decode DTS-HD in your PC but instead you pass-through the audio to your decoder via an optical cable. Your decoder will just play the Core. 
  • If you want to maximize compatiblity or reduce the size of the audio track you can convert to AC3 audio in a lower bitrate. 
  • If you are copying a Blu-ray to AVCHD, check your Blu-ray player's manual. If it supports (most likely it will) DTS-HD keep it, otherwise follow one of the options above. 
  • Of course if you are converting to mkv in order to store your movie, keeping the DTS-HD format is a good idea. It will be easy to decode soon enough in any PC so take a minute and think about what you need. 
  • Just to add my experience since I recently bought a DTS-HD sound system, if you listening to your movies in low - normal volume you really can't tell any difference between the lossless DTS-HD and just the Core. If you starting increasing the volume, especially in action films you can tell some difference, but as the DTS-HD whitepaper says the Core is also a very capable lossy format and given the huge bitrate of 1500kbps that it usually uses, in most cases you are fine just ripping the Core. 
If you decode through your PC or you passthrough to a decoder that doesn't support DTS-HD you don't need both streams. Even if you keep the whole track, you will only listen to the Core, so just keep that and remove the HD audio. With Pavtube Video Converter UltimateYou might be able to decode DTS-HD in your PC but instead you pass-through the audio to your decoder via an optical cable.

 

Other Download:
- Pavtube old official address: http://www.pavtube.cn/blu-ray-video-converter-ultimate/
-http://download.foxreal.com/
- Cnet Download: http://download.cnet.com/Pavtube-Video-Converter-Ultimate/3000-2194_4-75938564.html

Step 1.Add blu-ray file

Free download and run this trust-worthy blu-ray to PS4 ripper on your Mac, import the blu-ray movie you'd like to rip by clicking "blu-ray Disc" button . Or simply load blu-ray folder and ISO image by clicking the relative button on the main interface. You can also get its windows version to tackle won't play blu-ray' problem. 




Step 2. Select output format

From the pop-up small window, you can choose " Profiles settings" --> " audio" and choose “DTS"as the output video format. Click the "Done" to return to the main interface. 




Tips: the stunning "Edit" feature lets you crop the video size to better suit your PS4's screen, trim the video segment, add watermark and external subtitle as you want.

Step 3. Select output folder

Specify output folder on your computer to save the output files. Click the "Browse" button to choose the path where you want to save the output files in.

Step 4. Start converting

With the above steps been finished, click the "Converter" button to start conversion on your computer.

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