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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Li Hong Ma Hao Zheng Shi Jiao Chen Jing Tian |
| Copyright Year | 2011 |
| Description | Author affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798 (Jing Tian) || School of Electronics and Information Engineering, South China University of Technology, Guangzhou, China 51064 (Li Hong Ma; Hao Zheng; Shi Jiao Chen) |
| Abstract | To effectively estimate the linear spectrum frequency (LSF) by intra- and inter- frame dependence of LSFs, an intraframe conditional vector quantization (CVQ) combined with interframe interpolation (CVQ-I) is proposed to estimate the lost LSFs. We firstly partition the dependent 10-dimension LSFs in a frame into two bundles: the first 4-dimension vectors called low part LSFs (LPL, hereafter LPL also means 1 LSF in LPL) and the left 6-dimension vectors called high part LSFs (HPL). Then we enlarge the CVQ codebook so that each HPL maps a sub-codebook related to K LPLs. If a LPL is lost, K codevectors mapped to the same known HPL in CVQ are used as K estimations of the lost one, besides the (K+1)th estimation derived from linear interpolation between LPLs of the previous and the next available frames. The optimal LPL among these (K+1) estimations is finally obtained under the MMSE criterion. We also design an interleaving scheme CVQ-I which reserves LPLs while interleaves HPLs with those of the previous frame to recover a lost frame from the previous and the next available frames. Experiments show that PESQ of the new method is higher than interpolation by 0.017 at an average loss rate 10%. Its 0.005 promotion in MOS and a 0.0053dB decrease in spectrum distortion also demonstrate that adding several bits in codestream is a worthy pay to carry optimal indexes. |
| Starting Page | 330 |
| Ending Page | 334 |
| File Size | 899940 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781457702563 |
| ISSN | 21593450 |
| e-ISBN | 9781457702556 |
| DOI | 10.1109/TENCON.2011.6129119 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-11-21 |
| Publisher Place | Indonesia |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Estimation Interpolation Speech Speech processing Correlation Quantization intraframe dependence conditional vector quantization Linear spectrum Frequency interleave |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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