Spatial Coding of Multi-channel Audio Signals in Sound Field Reproduction
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- Kimura Toshiyuki
- JSPS:Graduate School of Information Science, Nagoya Univ.
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- Kakehi Kazuhiko
- Graduate School of Information Science, Nagoya Univ.
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- Takeda Kazuya
- Graduate School of Information Science, Nagoya Univ.
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- Itakura Fumitada
- Center for Information Media Studies, Nagoya Univ.
Bibliographic Information
- Other Title
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- 音場再現におけるマルチチャネル信号の空間符号化
- オンジョウ サイゲン ニ オケル マルチチャネル シンゴウ ノ クウカン フゴウカ
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Abstract
The sound field reproduction technique based on the Huygens's principle is important to realize auditory virtual reality. However, it is necessary to transmit many multi-channel signals. In this paper, a new spatial coding technique for the multi-channel signals is proposed to reduce transmission bit rate. Source signals are extracted by convolving the inverse transfer function calulated from a room transfer function to the channel signals at an encoded side. At a decoded side, channel signals are reconstructed by convolving the room transfer function to the extracted source signals. As a result, the size of data to be transmitted is reduced from the number of channels to that of sound sources. A coding experiment was performed for a real sound field. It was confirmed by subjective assessment that the perceptual distortion of the coding had little effect on the perceptual quality of sound field even if the source signals are not completely extracted.
Journal
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- Transactions of the Virtual Reality Society of Japan
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Transactions of the Virtual Reality Society of Japan 8 (4), 433-442, 2003
THE VIRTUAL REALITY SOCIETY OF JAPAN
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Keywords
Details 詳細情報について
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- CRID
- 1390282679441656320
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- NII Article ID
- 110008746907
- 10015310001
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- NII Book ID
- AA11448578
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- ISSN
- 24239593
- 1344011X
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- NDL BIB ID
- 6819615
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed