1.Due to the great development of algorithms and computing power in the field of digital audio, "spatial audio" has gradually stepped out of the laboratory, and there are more and more application scenarios in the field of professional audio, consumer electronics and automobiles. There are more and more product forms.
2.The implementation methods of spatial audio can be roughly divided into three categories. The first type is based on physical accurate reconstruction, the second type is based on psycho acoustic principles and physical production reconstruction, and the third type is based on binaural signal reconstruction. The first two types of algorithms are common in real-time three-dimensional sound rendering software or hardware in the field of professional sound reinforcement, while in post-production in the field of professional recording, these three algorithms are common in spatial audio plug-ins of digital audio workstations.
3.Spatial audio is also called multi-dimensional sound, panoramic sound or immersive sound. Currently, there is no strict definition of these concepts, so they can be regarded as a concept. In the real-time performance application of sound reinforcement, engineers often do not strictly follow various algorithms to apply the replay speaker placement regulations, but use it according to the live effect.
4. At present, there is a "Dolby" certification in the field of film production and playback and home theater systems, and there are usually relatively standardized surround sound and panoramic sound speaker placement regulations in the film industry, but in the field of professional sound reinforcement In real-time performances with relatively high technical requirements, the number and placement of speakers are not clearly stipulated, and there are no similar regulations in the automotive field.
5. In commercial theaters or home theaters, related industries or manufacturers at home and abroad already have a set of measurement criteria and methods to measure whether the system and sound playback meet the standards, but how to judge the space when emerging application scenarios and various algorithms emerge in endlessly? There is no consensus or effective means of measuring whether a sound system is "good". Therefore, it is still a very worthwhile technical issue and a difficult challenge to establish a set of specifications that meet the application criteria of the domestic market.
6. In the domestic substitution of algorithms and hardware products, consumer audio products and automotive applications are at the forefront. In the current application in the field of professional audio, foreign brands are superior to domestic brands in terms of sound quality, advanced digital signal processing algorithms, and completeness and reliability of system architecture, so they firmly occupy most of the domestic market.
Application engineers in the professional field have gained a wealth of practice and technology accumulation in the past years of venue construction and prosperous live performances. In the stage of technology and industrial upgrading, we should have an in-depth understanding of digital signal processing methods and algorithm theories, and other Only by paying attention to the development trend of the audio industry can we have a stronger control over the technical application level.
7.The field of professional audio requires us to use various level conversions and various algorithm adjustments in very complex scenes, and at the same time to present the expressiveness and appeal of music to the audience as much as possible without distortion. But I hope that while paying attention to foreign high-tech and foreign high-end products, we will look back and pay attention to our own local companies in a timely manner. Is our own speaker technology solid and quality control strict? , Whether the test parameters are serious and standard.
8. Only by earnestly paying attention to technology accumulation and iteration and keeping up with the pace of industrial upgrading of the times can we continue to develop in the post-epidemic era and usher in breakthroughs in new technology forces, and complete a breakthrough in the professional audio field.
Post time: Nov-25-2022