| 摘要 |
- 33 Abstract A method and apparatus for determining a spatial output multi-channel audio signal based on an input audio signal, the apparatus (100) comprising: a semantic decomposer 5 (110) configured for decomposing the input audio signal to obtain a first decomposed signal having a first semantic property, the first decomposed signal being a foreground signal part, and a second decomposed signal having a second semantic property being different from the first 10 semantic property, the second decomposed signal being a background signal part; and a renderer (120) for rendering the first decomposed signal using a first rendering characteristic to obtain a first rendered signal having the first semantic property and for rendering the second 15 decomposed signal using a second rendering characteristic to obtain a second rendered signal having the second semantic property, wherein the first rendering characteristic and the second rendering characteristic are different from each other. The renderer (120) comprises a 20 first DirAC monosynth stage (610) for rendering the foreground signal part, the first DirAC monosynth stage (610) being configured for creating a first mono-DirAC stream leading to a perception of a nearby point-like source, and a second DirAC monosynth stage (620) for 25 rendering the background signal part, the second DirAC monosynth stage (610) being configured for creating a mono-DirAC stream leading to a perception of spatially spread sound, and a processor (130) for processing the first rendered signal and the second rendered signal to 30 obtain the spatial output multi-channel audio signal, wherein the processor (130) comprises a DirAC merging stage (630) for merging the first mono-DirAC stream and the second mono-DirAC stream. 2938077_1 (GHMatter) P86385.AU smoothed 410 spectrum 430 440 backgroun soundral DFT - - + whitening -' pea l _ikn ./.ontonal noise + transient residual ,, signal noise f I e idua mix -+ hap-ngDF 450 460 470 480 foreground soun~dj audio in- - DiACN y=0-- monosynth, 0 base-- randomized with time 0 6 rang--- constant with freq. 620---3 background sound63 audio in- DirAC- IN W = 0- monosynth 0 base- randomized with time 0 0 range- 9 randomized with freq. |
