As a result, your home theater receiver will not have to do any additional audio decoding before the audio is sent through the amplifier and speaker section.
As a result, the AV receiver will not have to perform any additional audio decoding before it is sent to the amplifier section and speakers. With this option, the home theater receiver will display the PCM term on its front panel display.
Then, if the user decides to use Bitstream as the HDMI audio output setting for their Blu-ray player, the player will bypass its own internal Dolby and DTS audio decoders and send the signal without decoding to their HDMI-connected home theater receiver.
The home theater receiver will do all the audio decoding of the incoming signal. There is currently no Blu-ray player that can decode these formats internally for PCM and pass them on to the Home Theater receiver, which in part finishes this PCM vs Bitstream confrontation. You have the option to choose which type of setting to use PCM vs Bitstream , and as mentioned above, each setting should produce the same audio quality , taking into account the exceptions of Dolby Atmos and DTS:X.
This function provides access to audio comments, descriptive audio or other supplementary audio tracks. If access to these audio programs is important to you, keeping your Blu-ray player set to PCM will provide the best quality result.
In this case, your home theater receiver will recognize the signal as Dolby Digital standard and decode it properly. After you determine the audio settings you want to use to transfer audio from your Blu-ray player to the rest of your home theater system, you must also decide what type of connections to use.
So after you can determine which audio settings you want to use to transfer audio from your Blu-ray Disc player to the rest of your home theater system, you must also decide what type of connections you need to use.
If you use either the coaxial or optical digital connection option of your Blu-ray player to your home theater receiver very useful if your AV receiver does not have HDMI connections , you can also select the PCM vs Bitstream output options for those connections. The reason for this is that the optical digital cable or coaxial cable does not have sufficient bandwidth capacity to transfer a decoded, uncompressed, full surround sound signal, as the HDMI connection can.
If you are using the optical digital or coaxial digital connection option from your Blu-ray Disc player to your home theater receiver useful if your home theater receiver does not have HDMI connections , you can also select PCM vs Bitstream output options for those connections.
The reason for this is that a digital optical or coaxial digital cable does not have sufficient bandwidth capacity to transfer a decoded, uncompressed, fully surround audio signal as an HDMI connection can. While Bitstream and PCM are very different, these two configurations are very similar when applied in audio production. Here are several similarities to consider when choosing which is the best option for you:.
However, there is another factor to consider as to which setting may be best for you to decide in this discussion PCM vs Bitstream. This involves access to secondary soundtracks, such as audio commentary, descriptive audio, or other supplementary audio tracks. If access to these audio features is important to you then keep your Blu-ray player configured with the PCM audio output option that would be the best choice for you.
Alternatively, you can always switch from PCM to Bitstream at any time by going to the appropriate settings menu. While audio signals are produced differently in both cases, there is no audible difference between Bitstream and PCM files.
However, the Bitstream files are encoded to give you a surround sound experience when used with a compatible media player. On the other hand, most audio players only support the PCM format while transmitting sound. That means you should check the compatibility of your device when choosing between the two. HDMI is easily the best option for output. Facebook Twitter LinkedIn. Updated on October 11, Jessica Kormos. Lifewire Technology Review Board Member. Jessica Kormos is a writer and editor with 15 years' experience writing articles, copy, and UX content for Tecca.
Article reviewed on Jun 29, Tweet Share Email. In This Article. PCM Basics. Was this page helpful? Thanks for letting us know! Email Address Sign up There was an error. Please try again. You're in! Thanks for signing up.
Selecting pcm output results in what i would consider a more balanced output. What is happening here, why is the Dolby digital option so much louder? Kit is Samsung mu with lg Sl8yg. Last edited: Aug 6, If outputting PCM from a TV then it will be stereo and if the source was multichannel in nature than the PCM output from the TV will be the multichannel audio mixed down into just 2 channels. The LFE channel included with multichannel formats isn't however mixed down into the 2 channel PCM signal and this could be why you are under the impression that the PCM audio is quieter?
Dialogue normalisation Dialnorm alters the dynamic range associated with the DD audio being played. Thanks Dante, the reason it seems odd to me is that the soundbar is pushing into compression at about half volume.
I would be interested to see if I get the same result from an LG tv. PCM results in a listening level at about 20 halfway on the soundbar which when pushed to max volume we are reaching compression. Dolby digital results in a comfortable listening level of about 10 at 15 we are running out of headroom.
These findings are similar to the comment above which states DD results in a louder wider soundstage, but headroom is significantly reduced on my system.
Edit 2. After playing around some more it seems the LG is applying the boost only in movie mode, standard mode results in far less boost between DD and pcm. Dans said:. Hi all Hope someone can help. So I have a samsung ue55ru tv and a very old Samsung sound bar the hw-f This soundbar is only 2.
Had this soundbar for over 5yrs and its never failed me. So decided to upgrade the soundbar as my 4k TV is less than a Yr old and thought its time for an upgrade for sound, so bought the samsung q60t soundbar, arrived and setup it all up by just plugging it in, TV recognised it straight away. So no settings changed either on the TV or soundbar, went onto YouTube to play so.
CmdPewPew said:. So judging my the comments above is that PCM is actually better. Last edited: Dec 1, You must log in or register to reply here. Similar threads. Replies 10 Views Sep 12, Rodders Denon AVC not outputting height and rear surround at same time. Replies 3 Views Oct 5, Dobbyisfree. And these compression methods are based on various hypotheses. As example, AAC format was developed to improve mp3 sound quality according newer knowledges about brain processing of sonic information [ 1 ].
From this point of view, mp3 and FLAC are "bitstream" too. As rule, higher stream volume for single codec give better sound quality. But, other hand, higher bitrate may lead to lesser channel number in fixed band width of digital interface. As example, stereo instead multichannel. AV users asks what is use PCM or bitstream to transmit data from player to audio-video receiver of home theater. Otherwise, use bitstream codecs.
Dolby is size compressed PCM. It used to transmit audio signal thru digital audio interfaces with lower speed. If compression is lossless, it is not matter Dolby or original PCM there. Lossy compressing cause some quality losses. Generally, it is impossible to say, the losses will audible or not. Because different hardware is used there. It is common PCM in audio. Sound quality mean distortion level. However, distortions may have different distribution by frequency and phase.
And distortions must be estimated in the light of psychoacoustics. Aliases distortion appear during analog-to-digital and digital-to-analog conversion. Sample rate define the alias period on frequency axis.
The period is half of sampling rate. All audio content above the period should be removed to avoid of distortions of useful musical signal. The analog filter makes the removing. However, analog filter isn't steep. Bit depth define minimal noise level into record.
If recorded musical stuff will digitally processed gain increasing, equalization, level normalizing, other , noise floor of processed stuff should be below DAC noise level. In audio software, processing may be implemented in or bit float point formats.
These formats have high precision low quantization noise and better overload abilities, than integer ones. As far as author know, DAC can't receive data in float point formats. These formats are rounded to integer into playback software to send to DAC. DAC with sigma delta modulator are able to receive float point formats. But author know nothing about such real implementations. It give base to myth that Hz is maximally reasonable sample rate. And there is opinion, that higher sampling rates aimed for ultrasound playback, that we can't hear.
Nyquist theorem, indeed, says that analog sine may be coded to digital PCM and restored back to analog without loses. But it is ideal concept, that require infinite time of recording and playback and ideal brickwall filter. Narrow transient band is difficult for analog filter. Steeper digital filter, more intensive its ringing distortions. Also may be technical resource limitations to build steep enough filter. Inside DAC upsampling with digital filter is used for proper filter work.
But hardware may have calculation resource limitation to implement sophisticated filter. We know that human hear sonic in range To keep sound quality signal must be higher noise. We can take noise level about dB as allowable. Digital audio data may be corrupted in transmitting or at storage. It can be checked via checksum comparison.
Audiophile players are capable to bit-perfect playback of audio files: audio file content is sent to DAC without altering.
CD ripper is kind of audio converter that capable to copy CD audio data to file. Dolby Digital is family of size-compressed PCM audio formats. Dolby Digital formats may be lossless by sound quality or lossy compressed. Dolby Digital if family of size-compression methods of PCM pulse-code modulation audio with or without losses.
Dolby Digital is one of PCM format family. Losslessly compressed formats causes lesser distortions than lossy ones. Dolby Digital supports both types of the compression. So, using uncompressed PCM is preferable, where no requitiments to:. HDMI is just protocol and hardware interface to transmit audio data. PCM format is digital representation of recorded analog sound. These factors should be considered in complex according to your application. However, the best-sounding audio resolution is matter of used musical equipment rather.
Sometimes, size-compressed PCM audio is called as "bitstream audio".
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