An improved signal processing algorithm for virtual reproducing 5.1 channel surround sound by headphone is proposed. Firstly, by analyzing current signal processing algorithm, it is pointed out that current algorithms...An improved signal processing algorithm for virtual reproducing 5.1 channel surround sound by headphone is proposed. Firstly, by analyzing current signal processing algorithm, it is pointed out that current algorithms will create unnatural subjective hearing effect. Then, by using the method of HRTF (Head-related transfer function) filtering and surround signal decorrelating, the improved algorithm is able to eliminate the defect of in-head-localization in headphone reproduction and simulate the subjective effect of multi surround loudspeakers while not to induce other unnatural effect. Therefore, the improved signal processing algorithm can increase envelopment and improve the subjective effect in headphone reproduction.展开更多
An improved virtual reproducing system for 5.1 channel surround sound and signal processing algorithm of the system are proposed. Firstly, by analyzing the sound field of virtual reproducing systems for 5.1 ch surroun...An improved virtual reproducing system for 5.1 channel surround sound and signal processing algorithm of the system are proposed. Firstly, by analyzing the sound field of virtual reproducing systems for 5.1 ch surround sound, it is proved that there are some defects in current systems, including narrow listening area, sound image direction distortion, timbre change in reproduction etc. Then from theoretical analysis, it is proposed that, by decreasing the separated angle between reproducing loudspeaker pair to ±15° and using signal processing algorithm with timbre equalization, the improved system can get rid of the defects of current systems. Additionally, the signal processing algorithm of improved system is also simple. The results of psychoacoustic experiment verify theoretical analysis, and show that improved system is able to recreate sound image in half of horizontal plane (about±90°) in the front. Finally, the system and its arrangement of loudspeakers are suitable to be used in TV sets or multimedia computers.展开更多
Based on non-equilibrium thermodynamic theory, a temperature field model of gun muzzle is setup We obtain not only a solitary solution, but also a bifurcation solution. The physical picture of the solutions is corresp...Based on non-equilibrium thermodynamic theory, a temperature field model of gun muzzle is setup We obtain not only a solitary solution, but also a bifurcation solution. The physical picture of the solutions is corresponding to the center flame and secondary flame of the gun muzzle.展开更多
Based on the consideration of being compatible with 5.1 channel horizontal surround sound system, a spatial surround sound system is proposed. Theoretical and experimental results show that the system has a wide liste...Based on the consideration of being compatible with 5.1 channel horizontal surround sound system, a spatial surround sound system is proposed. Theoretical and experimental results show that the system has a wide listening area. It can not only recreate stable image in the front and rear direction, but also eliminate the defect of poor lateral image of 5.1 channel system. The system can be used to reproduce special 3D sound effect and the spaciousness of hall.展开更多
基金This work is supported by the Excellent Young Teachers Programof MOE,P.R.C.and the Project of TCL Corporation
文摘An improved signal processing algorithm for virtual reproducing 5.1 channel surround sound by headphone is proposed. Firstly, by analyzing current signal processing algorithm, it is pointed out that current algorithms will create unnatural subjective hearing effect. Then, by using the method of HRTF (Head-related transfer function) filtering and surround signal decorrelating, the improved algorithm is able to eliminate the defect of in-head-localization in headphone reproduction and simulate the subjective effect of multi surround loudspeakers while not to induce other unnatural effect. Therefore, the improved signal processing algorithm can increase envelopment and improve the subjective effect in headphone reproduction.
基金This work was supported by the Excellent Young Teachers Program of MOE,P.R.C.and the Project of TCL Corporation
文摘An improved virtual reproducing system for 5.1 channel surround sound and signal processing algorithm of the system are proposed. Firstly, by analyzing the sound field of virtual reproducing systems for 5.1 ch surround sound, it is proved that there are some defects in current systems, including narrow listening area, sound image direction distortion, timbre change in reproduction etc. Then from theoretical analysis, it is proposed that, by decreasing the separated angle between reproducing loudspeaker pair to ±15° and using signal processing algorithm with timbre equalization, the improved system can get rid of the defects of current systems. Additionally, the signal processing algorithm of improved system is also simple. The results of psychoacoustic experiment verify theoretical analysis, and show that improved system is able to recreate sound image in half of horizontal plane (about±90°) in the front. Finally, the system and its arrangement of loudspeakers are suitable to be used in TV sets or multimedia computers.
文摘Based on non-equilibrium thermodynamic theory, a temperature field model of gun muzzle is setup We obtain not only a solitary solution, but also a bifurcation solution. The physical picture of the solutions is corresponding to the center flame and secondary flame of the gun muzzle.
基金National Natural Science Foundation of China(19974012)
文摘Based on the consideration of being compatible with 5.1 channel horizontal surround sound system, a spatial surround sound system is proposed. Theoretical and experimental results show that the system has a wide listening area. It can not only recreate stable image in the front and rear direction, but also eliminate the defect of poor lateral image of 5.1 channel system. The system can be used to reproduce special 3D sound effect and the spaciousness of hall.
