dolby pro logic is a "Dolby Directional Logic" surround sound system developed by Dolby Company of the United States. Dolby surround system is a cinema sound system successfully developed by Dolby Laboratories in the United States to improve stereo quality.
dolby pro logic technology-
dolby pro logic technology is a series of powerful technologies used to provide rich, clear and breathtaking sound effects for cinemas, homes and on the road. This technology can further enhance the appeal of entertainment by providing a vibrant listening experience for content used for broadcasting, downloading, streaming, playing in theaters or enjoying through CDs.
With the help of dolby pro logic technology, sound effects can be realized to enhance the listening experience of movies, TV programs, music and games from multiple levels. Dolby pro logic technology can provide up to 7.1
channels of surround sound, including virtual surround from any source and transmitted through headphones.
in addition, it can improve the clarity of dialogue, so that you can hear every word clearly. With dolby pro logic
technology, the volume level will not constantly change between different programs. In addition, you can download streaming video faster. Even, it can turn your mobile phone into a high-quality home theater source, so as to play audio through home settings.
Extended materials:
1. The working principle of dolby pro logic technology-
dolby pro logic technology can be used in set-top boxes, mobile phones, tablet computers, home audio systems and other devices, and the recorded content can be integrated with auxiliary playback technology. In this way, no matter where and how you enjoy entertainment, you can achieve a consistently high-quality listening experience. Every technology in dolby pro logic technology is designed for a specific medium, so as to provide the highest quality sound effect for the corresponding medium
2. Sound effect application-
In stereo cinema, in order to create an immersive sense of space for the audience, in addition to the left and right channels, there are also center channels that can enhance the sound effect on the screen and surround channels that can make the audience feel the ambient atmosphere and special effects. This surround sound channel uses many speakers, which are erected in parallel along the two side walls and the back wall.
Because direct recording and transmission of multi-channels is expensive and inconvenient, in 1976, Dolby Laboratories invented Dolby Stereo Film System, which denoised the information of left, middle, right and surround channels and compiled and recorded them into two channels in a certain way. When playing, it is restored to four channels in the opposite way (that is, 4-2-4 mode), thus realizing the compatible transmission of multi-channel and two-channel
In Star Wars, filmed in the late 197s, dolby surround system successfully realized the synchronization of sound direction and picture movement, which made the audience feel the sense of orientation and scene as the sound whizzed overhead, and caused a shock in the film industry. Therefore, this system was widely used in cinemas later.
Reference: Baidu Encyclopedia-dolby pro logic.