confidencescorer.java

来自「It is the Speech recognition software. 」· Java 代码 · 共 64 行

/*
 * Copyright 1999-2004 Carnegie Mellon University.
 * Portions Copyright 2004 Sun Microsystems, Inc.
 * Portions Copyright 2004 Mitsubishi Electric Research Laboratories.
 * All Rights Reserved.  Use is subject to license terms.
 *
 * See the file "license.terms" for information on usage and
 * redistribution of this file, and for a DISCLAIMER OF ALL
 * WARRANTIES.
 *
 */
package edu.cmu.sphinx.result;

/**
 * <p>
 * Computes confidences for a Result.
 * Typically, one is interested in the confidence of the best path
 * of a result, as well as the confidence of each word in the best path
 * of a result. To obtain this information, one should do the following:
 * </p>
 *
 * <pre>
 *
 * ConfidenceScorer scorer = (ConfidenceScorer) ... // obtain scorer from configuration manager
 *
 * Result result = recognizer.recognize();
 * ConfidenceResult confidenceResult = scorer.score(result);
 *
 * // confidence for best path
 * Path bestPath = confidenceResult.getBestHypothesis();
 * double pathConfidence = bestPath.getConfidence();
 *
 * // confidence for each word in best path
 * WordResult[] words = bestPath.getWords();
 * for (int i = 0; i < words.length; i++) {
 *     WordResult wordResult = (WordResult) words[i];
 *     double wordConfidence = wordResult.getConfidence();
 * }
 *
 * </pre>
 *
 * <p>
 * Note that different ConfidenceScorers have different definitions for
 * the 'best path', and therefore their <code>getBestHypothesis</code> methods
 * will return different things. The
 * {@link edu.cmu.sphinx.result.MAPConfidenceScorer} returns the highest
 * scoring path. On the other hand, the
 * {@link edu.cmu.sphinx.result.SausageMaker} returns the path where
 * all the words have the highest confidence in their corresponding time slot. 
 * </p>
 */
public interface ConfidenceScorer {

    /**
     * Computes confidences for a Result and returns a ConfidenceResult,
     * a compact representation of all the hypothesis contained in the
     * result together with their per-word and per-path confidences.
     *
     * @param result the result to compute confidences for
     * @return a confidence result
     */
    public ConfidenceResult score(Result result);
}