RU2023122339A - METHODS, DEVICES AND SYSTEMS FOR EXPANDING THREE DEGREES OF FREEDOM (3DOF+) MPEG-H 3D AUDIO - Google Patents

Claims (32)

1. A method for processing position information indicating the position of an object for an audio object, wherein the processing is performed using an MPEG-H 3D Audio decoder, wherein the position of the object is used to render the audio object, wherein the method includes: receiving a bit stream containing encoded audio; decoding from the audio object bitstream and position information for the audio object; obtaining listener orientation information indicating the orientation of the listener's head; obtaining listener displacement information indicating a displacement of the listener's head relative to the nominal listening position through an input interface of the MPEG-H 3D Audio decoder; determining the position of an object from position information, wherein the position information contains an indication of the distance from the sound object to the nominal listening position; modifying the object's position based on information about the listener's displacement by applying translational movement to the object's position; And additional modification of the modified position of the object based on information about the orientation of the listener, and when the listener displacement information indicates the displacement of the listener's head from the nominal listening position due to a small position displacement, and the small position displacement has an absolute value of 0.5 meters or less than 0.5 meters, the distance between the position of the sound object and the listening position after the listener's head displacement is equal to the distance between the modified position of the sound object and the nominal listening position. 2. Method according to claim 1, characterized in that: the modification of the object position and the additional modification of the modified object position are performed such that the sound object, after rendering on one or more real or virtual speakers in accordance with the additional modified object position, is psychoacoustically perceived by the listener as arising from a fixed position relative to the nominal listening position, regardless of the listener's head displacement from the nominal listening position and the orientation of the listener's head relative to the nominal orientation. 3. Method according to claim 1, characterized in that: modification of the object's position based on the listener's displacement information is accomplished by progressively moving the object's position equal to the displacement of the listener's head from the nominal listening position, but in the opposite direction. 4. Method according to claim 1, characterized in that: the listener displacement information indicates the displacement of the listener's head from the nominal listening position, which is achieved by movement of at least one of the user's upper body and head. 5. The method according to claim 1, characterized in that it additionally includes: detecting the listener's head orientation using wearable or stationary equipment. 6. The method according to claim 1, characterized in that it additionally includes: detection of the listener's head displacement from the nominal listening position using wearable and/or fixed equipment. 7. The method according to claim 1, characterized in that the distance between the modified position of the sound object and the listening position after the shift is mapped to gain factors for modifying the sound signal level. 8. A non-transitory computer-readable medium containing instructions that, when executed by a digital signal processor or microprocessor, cause the digital signal processor or microprocessor to execute the method of claim 1. 9. An MPEG-H 3D Audio decoder or processing position information indicating an object position for an audio object, wherein the object position is used to render the audio object, wherein the decoder comprises a processor and a storage device coupled to the processor, wherein the processor is adapted to: receiving a bit stream containing encoded audio; decoding from the audio object bitstream and position information for the audio object; obtaining listener orientation information indicating the orientation of the listener's head; obtaining listener displacement information indicating a displacement of the listener's head relative to the nominal listening position through an input interface of the MPEG-H 3D Audio decoder; determining the position of an object from position information, and the position information contains an indication of the distance from the sound object to the nominal listening position; modifying the position of an object based on information about the listener's displacement by applying translational movement to the position of the object; And additional modification of the modified position of the object based on information about the orientation of the listener, and when the listener displacement information indicates the displacement of the listener's head from the nominal listening position due to a small position displacement, and the small position displacement has an absolute value of 0.5 meters or less than 0.5 meters, the distance between the position of the sound object and the listening position after the head displacement listener is equal to the distance between the modified sound object position and the nominal listening position.