DIRECTIONAL AUDIO RECORDING SYSTEM
A directional audio recording system functions to allow certain audio information to be captured and recorded for later consumption. The selection of audio information for capture may be accomplished by ascertaining the direction of an audio source from a directionally discriminating acoustic sensor and isolating acoustic information originating from the direction so determined. Directional cues may also be recorded and a playback system may apply the directional cues to the stored information representing audio in a spatialization engine such as head-related transfer functions.
1 . An directional recording system comprising:
a directionally discriminating acoustic sensor;
a beam forming unit connected to said directionally discriminating acoustic sensor;
a location processor connected to said beam forming unit;
a beam steering unit connected to said location processor and to said directionally discriminating acoustic sensor; and
a digital storage unit connected to said beam steering unit.
2 . A directional recording system according to claim 1 further comprising a record/playback controller connected to said digital storage unit.
3 . A directional recording system according to claim 2 wherein said digital storage unit is connected to said location processor.
4 . A directional recording system according to claim 3 wherein said digital storage unit stores information representing directionally isolated acoustic information.
5 . A directional recording system according to claim 4 wherein said digital storage unit stores information representing directional cues corresponding to said directionally isolated acoustic information.
6 . A directional recording system according to claim 5 further comprising a motion sensor connected to said location processor.
7 . A directional recording system according to claim 6 wherein said location processor further comprises an accelerometer.
8 . A directional recording system according to claim 6 wherein said directionally discriminating acoustic sensor is a microphone array.
9 . A directional recording system according to claim 6 wherein said record/playback controller is an audio buffer controller.
10 . A directional recording system according to claim 9 wherein said audio buffer controller has an output pause feature.
11 . A directional recording system according to claim 10 wherein said audio buffer controller has a rewind feature.
12 . A directional recording system according to claim 6 wherein said record/playback controller is a session controller.
13 . A directional recording system according to claim 12 wherein said record/playback controller further comprises and audio buffer controller.
14 . A directional recording system according to claim 6 further comprising an audio spatialization engine attached to said digital storage unit wherein said audio spatialization unit combines said information representing directionally isolated acoustic information with information representing directional cues.
15 . A directional recording system according to claim 14 wherein said audio spatialization engine further comprises a structure that combines said information representing directionally isolated acoustic information with information representing directional cues using head-related transfer functions.
16 . A directional recording system according to claim 15 wherein information representing directional cues connected to said spatialization engine is specified by said record/playback controller.