Is PCM Better Than Dolby Digital? The Truth


The development of technology has led to the growth of technologies that come in handy in day-to-day activities. Managing digital recording in the studio or at home requires using the appropriate technologies to ensure they receive the best quality of sounds.

To understand what technology to apply, you need first to understand the different types of digital formats and how they help you modulate your sounds.

The most commonly used technologies include pulse code modulation and Dolby digital. The technologies are widely used for their accuracy in converting digital audio recording.

Is pulse code modulation better than Dolby Digital?

Pulse code modulation is often higher quality as it uses uncompressed direct stereo to get a cleaner audio signal. Dolby digital formats will add extra compression to the audio signal to be able to transmitted a larger amount of audio across the same bandwidth. 

Many technical specialists will argue that the Dolby digital technique is better than the pulse code modulation as it offers good sounding audio with more channels.

This is not the case and depends on the quality of the sound you need and what you are trying to do.

When torn between pulse code modulation and Dolby digital, one should consider their device settings and outputs requirements.

For quality audio, the input offers should be at per with the supporting equipment. For instance, if you are watching on your television through a digital video disc, then the recommended technique is pulse code modulation.

Dolby digital is best when watching High Definition television as the audio does not have background noise.

It is important to note that your option while setting the configurations depends on the equipment connected with the television. Some work well with PCM and others for Dolby digital.

Each device comes with a manual that guides you on the correct configuration while setting up. Therefore, if you are unsure, it would be best to reach out to the manual for a guide.

Alternating the recommended technologies may lead to audio loss and volume loss.

Pulse code modulation is mainly used or configure in a device when the audio in the sound system experiences some higher setting problems.

The use of pulse code modulation acts as the last result, and in most cases, the pulse code modulation techniques work by providing high-quality sounds.

Factors that make pulse code modulation better than Dolby digital:

Digital formats

Dolby uses compressed data formats that make it possible to be applied in DVDs and surround formats. The DTS and Dolby digital are approaches used for compressing and saving the pulse code modulation stereo and the surround.

So depending on the need of the data transmitted, pulse code modulation becomes a better option than the Dolby digital.

Uncompressed PCM

In pulse code modulation, the audio is transmitted uncompressed, which minimizes data loss during compression. The blue-ray formats in pulse code modulation are slightly compressed, making pulse code modulation a better choice than Dolby digital.

Transmission mediums

In pulse code modulation, the stereo and surrounds are sent from the source to receiver on different methods depending on the nature and requirement of the transmitted signals. The methods include digital coaxial, high definition multimedia user interface, or optical.

Transmission of uncompressed digital formats in pulse code modulation uses large bandwidth hence making high definition multimedia interface the best option for transmission.

Modern telephones are equipped with technology that utilizes pulse density modulation and improved pulse code modulation to transmit the audio from the microphone to the signal processor.

Pulse code modulation is easy to control; nonetheless, pulse density modulation provides low disturbance of the transmitted signal from other signals at a low cost.

Dolby digital uses six discrete audio channels to transmit a signal over a communication channel. This increases the chances bleed overs in between channels. The transmitted signal is also separated during transmission making it less apparent in the sound information.

Dolby digital comes in handy when there is a need to mix the noise, such as in speakers where each speaker is fed its independent channel.

What is Pulse Code Modulation?

PCM is a digital practice that comprises sampling, encoding, and quantizing analog signals. The data analog signal is sampled at even recesses; the output amplitude is then coded in a sequence of binary numbers.

Variations of the carrier signal convey the signals. The continuous amplitude and continuous-time signal waveform in pulse code modulation are converted into discrete amplitude and time waveform.

Pulse code modulation produces a series of numbers that represent the approximate amplitude of the signal at that given instant.

The PCM has several elements that help to convert analog signals into digital signals perfectly. The elements include.

Low pass filter

The low pass filter is responsible for eliminating high-frequency components in the analog signal that exceeds the frequency of the message.


In sampling, the data samples are collected at instantaneous values to reconstruct back the message.


The encoder in pulse code modulation is responsible for digitizing the analog signals by designating quantized levels by a binary code. The encoder is also responsible for reducing the signal’s bandwidth to ensure that the signal takes less bandwidth during communication.


A quantizer receives the sample output from the sampler, reduces the redundant bit then compresses the signal values. Excessive bits are removed from the signal.

Regenerative repeater

Hence, the output signal strength is feeble; the regenerative repeater increases signal strength and compiles the signal loss.


This is among the final pulse code modulation elements that decode the pulse-coded waveform to the original signal.

Reconstruction filter

The decoded signal is passed through the reconstruction filter at a low pass to obtain the original signal.

Sing Pulse Code modulation Advantages:
  • It transmits the signal uniformly
  • It is secure for data transmission
  • There is no loss of data during modulation
  • It provides an easy platform to add or drop channels into the communication.
  • It is not susceptible to noise and interference.
  • It provides an efficient tradeoff of signal to noise ratio and the bandwidth
Pulse Code Modulation Disadvantages:

Overloading when the modulating signal is changing between the samplings
The transmission of the data requires a large bandwidth

What is Dolby digital?

Dolby Digital is a digital audio technique used to improve sound quality by reducing the quantity of data required to output good sound. Eliminating audio noise decreases the data to about one-tenth of data found on a compact disk.

Dolby’s digital use has increased in the market as it is used with digital versatile discs, digital cables, and satellite transmissions and in high definition televisions. It is considered as the industry standard for surround audios.

Dolby digital uses six channels: center, right, left, left surround, right surround, and low-frequency effects that provide unique effects and action sequences in films.

Dolby’s Digital Advantages:
  • The software is easy to access
  • It efficient to work with significant software
  • Provides excellent audio for music
  • It transfers channel levels to disc
Dolby’s Digital Disadvantages:
  • Quality degradation of the audio and video due to the high compression levels

A list of the best televisions that use pulse code modulation or Dolby digital sounds:

Before investing in any product, it is essential to identify your preferred preference for the applicable technology. High-quality products that one is assured of reliable output are a bit costly.

LG Nano cell 85 series 75-inch

LG NanoCell 80 Series 75” Alexa built-in 4k...
593 Reviews
LG NanoCell 80 Series 75” Alexa built-in 4k...
  • REAL 4K NANOCELL DISPLAY: Bring your favorite shows to life with bright, vivid...
  • QUAD CORE PROCESSOR 4K: Our Quad Core Processor 4K gives you a smooth, crisp viewing...
  • HOME CINEMA EXPERIENCE: See and feel like you're in the action with Active HDR. See...

The LG Nano cell 85 series is a true definition of modern technology as it offers excellent sound quality and display.

It uses a combination of both the pulse code modulation and Dolby digital to output significant sounds effects.

The Dolby digital gives it a fantastic mix of sound output with less signal interference. It also works well with the pulse code modulation settings in local dimming to enhance the viewing experience.

Both technologies work hand in hand to get deep blacks, realistic and enhanced contrast sounds.

SunBrite TV 55-inch 4k Ultra high definition

The SunBrite television is engineered with the customers’ needs in mind. The television can be installed outside or underneath a corridor for outdoor entertainment.

The sound system is built to provide high-quality sound with minimal sound interferences.

The television comes with three High Definition Multimedia Interfaces, and one High Definition Multimedia Audio return channel used to connect the tv and the audio system with a single high-speed HDMI.

Another existing feature of the SunBrite television is the direct LED backlighting that allows better brightness outdoors.

It applies the pulse code modulation technique in its design to ensure high-quality sound signals.

TCL 75-inch 4K UHDTV

TCL 75-inch 6-Series 4K UHD Dolby Vision HDR QLED...
4,390 Reviews
TCL 75-inch 6-Series 4K UHD Dolby Vision HDR QLED...
  • Superior 4K Ultra HD: Picture clarity combined with the contrast, color, and detail...
  • Mini-LED Technology: Uncompromised contrast, brightness, and uniformity for...
  • Product Size (WxHxD) with Stand: 65.8" x 41.4" x 15.9"; Product Size (WxHxD) without...

TCL 75-inch 4K ultra high definition television is one of the most affordable and high-quality television in the market.

It is integrated with modern technology such as the QLED technology, allowing one to control and enjoy streaming via the Roku app.

The technology also allows the television to be connected with the Alexa device enabling the user to enjoy advanced services.

Another significant element of the TCL 75-inch 4K ultra high definition television is pulse code modulation and Dolby digital techniques to give users high-quality sounds.

The television comes with an enhanced audio return channel that enables sending audio to the tv originating from a source device during purchase. The cable makes it simple to connect and experience the original sound.

It is also packed with three High Definition Multimedia Interface cables designed to fit your audio and video audio source devices.

It uses aluminum in its design to protect it from extreme weather conditions when placed outdoors.

Kuvasong 55-inch sun-readable television

KUVASONG True 1500 Nits 55 Inch 4K Sun Readable...
44 Reviews
KUVASONG True 1500 Nits 55 Inch 4K Sun Readable...
  • Television is designed to automatically reduce glare and enhance images for...
  • Features a TRUE 1500nits high brightness LED panel, perfect for the covered outdoor,...
  • Fully compatible with an ATSC+NTSC TV system, integrated with 3 HDMI ports, 3 USB...

Kuvasong 55-inch sun-readable television is designed to provide efficient sounds as a source of entertainment at home.

It can also be installed outdoors as its sound effects can reach far and wide.

The television comes with a built-in sound system that uses digital audio techniques to deliver good sound and default levels without adding any home theatre.

The television settings are more straightforward to easily select their preferred digital audio technology and match their equipment configurations.

The Kuvasong 55-inch sun-readable television is known for its fantastic display as it delivers one thousand, five hundred nits.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top