Bob 2.0 LBP histograms of spectrogram bands plus bands-ratio.
Algorithms have at least one input and one output. All algorithm endpoints are organized in groups. Groups are used by the platform to indicate which inputs and outputs are synchronized together. The first group is automatically synchronized with the channel defined by the block in which the algorithm is deployed.
Parameters allow users to change the configuration of an algorithm when scheduling an experiment
|mel_scale||Apply Mel-scale filtering or use linear (default - linear)||bool||True|
|pre_emphasis_coef||Pre-emphasis coefficient, used in the spectrogram computation||float64||1.0|
|f_max||Maximum frequency of the spectrogram||float64||4000.0|
|lbp_to_average||LBP parameter. Compare the pixels to the center pixel or to the average||bool||False|
|win_shift_ms||The length of the overlap between neighboring windows. Typically the half of window length.||float64||10.0|
|win_length_ms||The length of the sliding processing window, typically about 20 ms||float64||20.0|
|n_lbp_histograms||Split resulted spectrogram in the number of bands and compute LBP histogram for each||uint32||2|
|rate||Sampling rate of the speech signal||float64||16000.0||[2000.0, 256000.0]|
|n_filters||The number of filter bands used in spectrogram computation||uint32||40|
|lbp_circular||LBP parameter. Extract neighbors on a circle or on a square?||bool||True|
|lbp_radius||LBP parameter. The radius of the LBP in both vertical and horizontal direction together||uint32||1||[1, 10]|
|lbp_neighbors||LBP parameter. Number of neighbors||uint32||8||4, 8, 16|
|lbp_uniform||LBP parameter. Only uniform LBP codes (with less than two bit-changes between 0 and 1) are considered; all other strings are combined into one LBP code||bool||False|
|lbp_elbp_type||LBP parameter. How to generate the bit strings from the pixels: regular - Choose one bit for each comparison of the neighboring pixel with the central pixel; transitional - Compare only the neighboring pixels and skip the central one; direction-coded - Compute a 2-bit code for four directions.||string||regular||regular, transitional, direction-coded|
The code for this algorithm in Python
The ruler at 80 columns indicate suggested POSIX line breaks (for readability).
The editor will automatically enlarge to accomodate the entirety of your input
Use keyboard shortcuts for search/replace and faster editing. For example, use Ctrl-F (PC) or Cmd-F (Mac) to search through this box
Silent start and end of a sample are trimmed using Voice Activity Detection (VAD) labels as input.
This table shows the number of times this algorithm has been successfully run using the given environment. Note this does not provide sufficient information to evaluate if the algorithm will run when submitted to different conditions.