V. Actual Applications of DSP in Room Equalization.
Digital Signal Processing (DSP) has made significant development in the field of audio,
video, communications, and control systems. As multimedia has become prevalent, the
digital signal processing (DSP) of sound has transitioned from its earlier focus on
bandwidth-limited speech to today's application on providing a high-quality audio coding,
digital generation and manipulation of music signals [21].
In the recent years, DSP has successfully made a huge shift in audio industry triggering
the transitional phase of analog to digital audio devices. Some companies in the
professional audio market, like Sony, Samsung Electronics, Panasonic, uses chips made
by a handful of digital signal processing (DSP) manufacturers to add advanced
processing capabilities to their audio systems and equipment [24]. Some of the
manufactured devices/products that uses DSP are digital mixers, digital processors,
digital karaoke effects, amplifiers, etc [22].
Given the benefits and its integration into some of the modern audio devices, DSP
evidently plays a crucial role in enhancing people's everyday convenience, particularly in
audio listening and streaming. In relation with room equalization, DSP is notably
employed to enhance the consumer or user experience in various environments. The
following are some of the applications of DSP in different room setup:
1. Home Theatre or Stereo systems: DSP technology is generally used to calibrate
and optimize the audio performance of home theater systems by compensating for
room acoustics and providing a more immersive movie-watching experience. For
instance, when added to an amplifier or receiver, parameters might be manipulated
such as adding delay to make sure sound bounces the room [25].
2. Movie Theatre/Cinema: Filmmakers and audio professionals have transitioned
from analog signal processing (ASP) to digital signal processing (DSP) on creating
sophisticated audio mixes. DSP offered better sound production which help the
audience to immerse to the film.
3. Recording Studio: DSP plays a crucial role in audio console mixer in the recording
studio. In contrast to traditional mixers, which employ circuit-based technique to
correct signal current, DSP mixers utilizes digital chips and computer software to
digitize the signal and implement corrections. [22].
4. Conference Room: DSPs are responsible for managing audio inputs and outputs
in a conference system, processing all audio signals to provide participants with
clear and intelligible conversation during the conference. [46].
Aside from the mentioned applications, DSP can also be applied in room equalization for
malls, bars, sports complex, stadiums, and even in restaurants [24]. In addition, DSP is
also useful not only for the convenience of the listeners, but also for the efficient response
of smart electronic devices. For instance, DSP is observed having an increase utilization
for IoT applications, such as Smart Homes, where there is a growing demand for data
transmission through sound. DSP is particularly useful as it performs sound classification
and analysis for speech recognition and speaker identification applications, thereby
enhancing the reliability and efficiency of data transfer to the smart electronic devices.
Furthermore, digital signal processing plays a vital role in audio technology, particularly
in the room equalization. DSP devices such as amplifiers, mixers and processors are
commonly used to correct the response of audio devices, thus improving the overall
listening experience.
Conclusion:
[21] M. Kahrs and K. Brandenburg, Applications of digital signal processing to audio and
acoustics. 2002. doi: 10.1007/b117882.
[22] Digital audio equipment :What is DSP digital signal processing technology ? (2021,
July 21). www.sinbosen.com. https://www.sinbosen.com/n1861088/Digital-audioequipment-What-is-DSP-digital-signal-processing-technology.htm
[23] “WHICH DSP CHIP SOUNDS THE BEST ? - Yamaha - Africa / Asia / CIS / Latin
America / Middle East / Oceania.” https://asia-latinamericamea.yamaha.com/en/products/contents/proaudio/training_support/micro_tutorial/20170
421/index.html
[24] “Professional Audio Market Size & Share Analysis - Growth Trends & Forecasts
(2023 - 2028),” Mordor Intelligence, 2023. https://www.mordorintelligence.com/industryreports/global-professional-audio-market
[25] Ooberpad, “What is Digital Signal Processing (DSP)? Advantages & Relation with Home
Theatre | Ooberpad,” YouTube. Oct. 21, 2020. [Online]. Available:
https://www.youtube.com/watch?v=zvaYD8ojceI
[46] “How DSP Enhances Audio for A Successful Confrence,” Vissonic.
https://www.vissonic.com/news/294.html#:~:text=Digital%20signal%20processors%20(
DSPs)%20play,intelligible%20speech%20to%20conference%20participants.
[47] M. Sheier, “DSP Enablers in the Internet of Smart Things: Intelligence (Part #3) - CEVA’s
Experts blog,” CEVA’s Experts Blog, Nov. 15, 2023. https://www.ceva-dsp.com/ourblog/dspenablers-in-the-internet-of-smart-things-intelligence-part-3/
NTH. CONCLUSION
DSP in sound
DSP in audio technology
Application
Digital Signal Processing (DSP) presents a significant technological advancement with
far-reaching implications. It addressed the issues present in traditional signal processing,
including uneven distribution in audio sources, limited capability to adjust signal levels,
and time-related and phase issues. The transition from analog to digital signal processing
is observed to be beneficial in room equalization, where DSP's algorithms effectively
address acoustic challenges, promising a more immersive and accurate audio
experience. Overall, DSP presents a noteworthy transition, offering improved signal
manipulation and refined audio reproduction in a room setup.