3D Sound Field Generation for Large Display Screens
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Solution Overview
Problem
Current sound generating and reproducing technologies for home TVs struggle to create a realistic sound field that matches the increasing size of displays, particularly in the vertical direction, leading to a mismatch between image and sound, and difficulty in replicating the up-and-down motion of objects.
Innovation Solution
A sound generating and reproducing method that independently generates and reproduces sound signals for both horizontal and vertical directions using dedicated horizontal and vertical sound output means, with directivity characteristics that can be adjusted to match the video signal, allowing for a more immersive and realistic stereoscopic sound field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If horizontal sound field reproduction is used with conventional speakers, then stereophonic 2-channel reproduction is achieved, but the sound field does not match the increased display size and lacks vertical directionality
Solution Approach 1:
The patent transitions from conventional horizontal 2-channel sound reproduction to a three-dimensional sound field by adding vertical directionality. This is achieved by dividing the sound reproduction into horizontal and vertical components, with dedicated output means for each direction, thereby matching the spatial dimensions of the large display screen.
Solution Approach 2:
The sound reproduction system is segmented into independent horizontal and vertical sound output means. The horizontal sound output means handles left-right sound distribution while the vertical sound output means handles up-down sound distribution, allowing each component to be optimized for its specific function.
2Adaptability or versatility
If multi-channel surround reproduction technology is applied, then 360 degree horizontal sound field is achieved, but vertical direction sound reproduction is still not provided
Solution Approach 1:
The patent extends surround reproduction from two-dimensional horizontal plane to three-dimensional space by incorporating vertical sound output means. This adds the height dimension to the traditional horizontal surround sound, creating a true 360-degree omnidirectional sound field that includes vertical localization.
Solution Approach 2:
The multi-channel sound system is segmented into horizontal sound output means for left-right-rear sound distribution and vertical sound output means for up-down sound distribution, with each segment handling specific spatial directions to achieve comprehensive surround reproduction.
3Area of stationary object
If conventional sound reproduction is used with larger displays, then apparatus size increases, but the feeling of presence does not improve and mismatch between image and sound occurs
Solution Approach 1:
The patent matches the increased display area by adding vertical sound reproduction capability that corresponds to the vertical dimension of the large screen. This creates a spatially accurate sound field that fills the entire visual space, improving the immersion and presence feeling proportionally to the display size.
Solution Approach 2:
The sound reproduction system provides localized sound output in specific spatial directions corresponding to the image content. Vertical sound output means reproduces sounds from up-and-down directions to match vertical motion in the image, while horizontal sound output means handles left-right sound localization, creating directionally accurate sound-image correspondence.
4Ease of operation
If horizontal sound signals are reproduced with left and right speakers, then stereophonic reproduction is achieved, but up-and-down motion of objects cannot be clearly reproduced
Solution Approach 1:
The sound reproduction function is segmented into horizontal and vertical components with dedicated output means for each. The vertical sound output means specifically handles sounds related to up-and-down motion of objects in the image, providing clear vertical localization that cannot be achieved with horizontal speakers alone.
Solution Approach 2:
The patent adds the vertical dimension to sound reproduction by introducing vertical sound output means that can reproduce sounds from different heights and vertical directions. This enables accurate representation of vertical motion in the image, such as objects moving up or down, birds flying, or sounds coming from above or below the screen.
Data Source
AI summary
The present invention provides a sound generating method of generating sound signals related to a video signal, which comprises a step of generating independently each of the sound signals matched to a horizontal direction and a vertical direction of a video, and a step of allowing the horizontal and the vertical sound signals that have been generated to be reproduced independently with horizontal sound output means and vertical sound output means, respectively.