发明授权
US09373337B2 Reconstruction of a high-frequency range in low-bitrate audio coding using predictive pattern analysis 有权
使用预测模式分析重建低位音频编码中的高频范围

  • 专利标题: Reconstruction of a high-frequency range in low-bitrate audio coding using predictive pattern analysis
  • 专利标题(中): 使用预测模式分析重建低位音频编码中的高频范围
  • 申请号: US14084479
    申请日: 2013-11-19
  • 公开(公告)号: US09373337B2
    公开(公告)日: 2016-06-21
  • 发明人: Pavel ChubarevDmitry Shmunk
  • 申请人: DTS, INC.
  • 申请人地址: US CA Calabasas
  • 专利权人: DTS, INC.
  • 当前专利权人: DTS, INC.
  • 当前专利权人地址: US CA Calabasas
  • 代理商 Craig S. Fischer
  • 主分类号: G10L19/06
  • IPC分类号: G10L19/06 G10L19/02 G10L19/00 G10L19/04 G10L21/038
Reconstruction of a high-frequency range in low-bitrate audio coding using predictive pattern analysis
摘要:
A predictive pattern high-frequency reconstruction system and method that finds patterns in high-frequency components of an audio signal, encodes the audio signal into an encoded bitstream along with pattern information, and then uses the patterns to reconstruct the high-frequency components during decoding. The high-frequency components can be reconstructed using the pattern information alone. Embodiments of the system and method map normalized subband signals of the audio signal to a scaled representation of a time-frequency grid containing multiple tiles and perform statistical analysis on each tile to estimate subband parameters and determine whether a pattern exists. If a pattern does exist, it can be encoded in the encoded bitstream, transmitted, and used to reconstruct the high-frequency components at the decoder. A direct search technique and a fast Fourier transform (FFT) technique may be used to perform the statistical analysis.
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