Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
1997-01-13
2001-03-27
Brier, Jeffery (Department: 2672)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S215000
Reexamination Certificate
active
06208346
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an attribute information presenting apparatus for presenting attribute information such as sound information and picture information to be indicated to a reference point by an object according to the relative position of the object to the reference point.
The technology for realizing the function of stereo enhancement effect for enhancing the spreading sensation of stereo sound only by two speakers connected to a personal computer has been developed. This stereo enhancement effect is an acoustic effect of amplifying the spreading sensation of stereo sound in the horizontal direction, and by varying the frequency characteristic and phase of sound signal, the sound is heard from outside of the installed positions of the right and left speakers, and the depth sensation of sound is also increased.
This stereo enhancement effect is one of the acoustic effects created by the function known as three-dimensional sound. The three-dimensional sound is a function for realizing a solid acoustic effect by using two speakers, and by using only two speakers installed at specified positions, the sound is heard from the vertical, lateral and front-rear directions of the listener, that is, from all directions of the three-dimensional space surrounding the listener.
The three-dimensional sound possesses, in addition to the above acoustic effect of stereo enhancement effect, an acoustic effect of reproducing reflected sound and reverberation of a concert hall (sound field control), and an acoustic effect of moving a specific sound source freely so that the sound should be heard from an arbitrary direction of the listener (sound image localization). These acoustic effects are realized by varying the frequency characteristics and phase of the sound signal from two speakers in consideration of changes of frequency characteristic from the sound source until the sound actually reaches the ears of the listener.
Therefore, if the relative positions of the sound generating and moving object and the listener (viewer point) are different, sound signals having frequency characteristic and phase suited to the relative positions must be emitted from two speakers. In this case, hitherto, relative coordinates of the object to the viewer point are inputted, and audio data corresponding to the relative coordinates are created from the model audio data by using a filter circuit and others.
Besides, the technology for creating picture information such as object shape, color and texture, aside from the sound information, according to the relative position of the object to the viewer point has been also developed. In this case, same as in the case of sound, image data depending on the relative coordinates is created from the model image data.
FIG. 1
is a diagram showing the principle of a conventional attribute information presenting apparatus. The prior art has a relative coordinate input unit
101
for entering relative coordinates (r, &thgr;, &phgr;) of the object to the viewpoint expressed in polar coordinates, a model storage unit
102
for storing the model of various attribute information including object shape, color, texture, and sound, and a data creating unit
103
for creating data of desired attribute information on the basis of each model in the model storage unit
102
according to the relative coordinates inputted from the relative coordinate input unit
101
. When relative coordinates of the object to the viewer point are inputted in the data creating unit
103
through the relative coordinate input unit
101
, the model data of the object is read out from the model storage unit
102
. In the data creating unit
103
, the data of the attribute information at the point when the model data reaches the viewer point is created and delivered on the basis of the model data.
In this prior art, the processing quantity in the data creating unit
103
is huge when creating data of attribute information according to the relative coordinates inputted from the relative coordinate input unit
101
. Therefore, for creating and processing in real time, a high speed system is indispensable, which results in a high cost. Or, if the object moves very fast, even by using a high speed system, the creating and processing speed cannot follow up the changes of relative coordinates, and data of attribute information cannot be created in real time.
Also in the prior art, while the object and/or viewer point is moving, it is necessary to re-calculate the relative coordinates of the object to the viewpoint point all the time and input from the relative coordinate input unit
101
, and it demands tremendous labor in input of relative coordinates.
BRIEF SUMMARY OF THE INVENTION
It is hence a primary object of the invention to present an attribute information presenting apparatus capable of obtaining data of attribute information in real time, without requiring high speed processing system, by storing data of preliminarily created attribute information.
It is another object of the invention to present an attribute information presenting apparatus capable of creating data of attribute information in real time even if the object moves very fast.
It is a further object of the invention to present an attribute information presenting apparatus simplified in input of relative coordinates by calculating the transitional time series of relative coordinates of an object to a viewer point on the basis of a relative motion command inputted from outside.
The above and further objects and features of the invention will more fully be apparent from the following detailed description of the accompanying drawings.
REFERENCES:
patent: 5223828 (1993-06-01), McKiel, Jr.
patent: 5371854 (1994-12-01), Kramer
patent: 5633993 (1997-05-01), Redmann et al.
patent: 5642171 (1997-06-01), Baumgartner et al.
patent: 5682166 (1997-10-01), Takahashi
patent: 5771041 (1998-06-01), Small
patent: 5777612 (1998-07-01), Kataoka
patent: 5864343 (1999-01-01), Naughton et al.
Nikkei Electronics, No. 661; May 6, 1996 (pp. 127-138).
Kimura Shinta
Matsumoto Chikako
Sato Yasuo
Washio Nobuyuki
Yamamoto Eiichiro
Brier Jeffery
Fujitsu Limited
Good-Johnson Motilewa
Staas & Halsey , LLP
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