JP5298834B2 - Example sentence matching translation apparatus, program, and phrase translation apparatus including the translation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve translation accuracy and speed of a phrase translation device. <P>SOLUTION: A phrase translation device is provided with: a dictionary base translation part; an example matching translation part; a word alignment example base translation part; example group base translation part; an example base translation part; and a rule base translation part. The input phases are successively and stepwise input to the translation parts. In the example matching translation part, a plurality of pairs of example translations including input phrases are extracted from an example translation dictionary, and stored in a storage part. An example pattern retrieving part retrieves the pairs of example pattern translations corresponding to the stored pairs of example translations from an example pattern translation dictionary. An example matching part performs matching between examples in a first language and the example patterns and between examples in a second language and the example patterns for the pairs of example translations and the pairs of example patterns. A translation extraction part extracts the translations of input phrases based on the matching result. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an example sentence set base translation apparatus, method and program using an example sentence parallel translation dictionary, and a phrase translation apparatus including the example sentence set base translation apparatus.

  Machine translation is the conversion from one language to another using a computer, and such research and development has been conducted all over the world for half a century. Machine translation systems can be broadly divided into 1) analysis-based machine translation systems, 2) statistical-based machine translation systems, and 3) example sentence-based machine translation systems.

  The analysis-based machine translation system is a technique for performing analysis of a first language (morpheme analysis, syntax / semantic analysis, etc.), converting the analysis result to a second language, and further generating a translation of the second language. Since natural language analysis technology is still immature, there are limits to the practical application of analysis-based machine translation systems. Furthermore, since it cannot be learned, it has the disadvantage that it becomes difficult to improve and improve the translation engine.

  The statistical-based machine translation method is a technique for constructing a translation model using a language model and a statistical model. This method is limited in practical use because learning data (corpus) necessary for the configuration of each model is limited.

  The example-based machine translation method is to translate a new document by referring to a translation example sentence that has already been learned by imitating a mechanism in which a human learns a foreign language. This translation system was proposed in the 1980s, and research and development have been actively conducted since then. Example sentence-based machine translation technology includes translation memory translation technology, translation technology that uses bilingual example sentences with word alignment, translation technology that uses sentence patterns, etc. There is.

  FIG. 1 is a diagram illustrating an example of the overall configuration of a machine translation system according to an example sentence-based machine translation system. The machine translation system 10 is configured to shift from a simpler translation to a more complicated translation, thereby speeding up translation. In addition, the machine translation system 10 has a learning function that automatically collects portions that cannot be translated and gives an accurate parallel translation.

  The machine translation system 10 translates a sentence unit sentence inputted from the source language text sentence input unit 12, and an input sentence that could not be collated in the translation memory apparatus 14, that is, an input sentence deemed inappropriate. An example sentence pattern base translation device 16 that translates example sentence patterns such as words that have been input and subjected to morphological analysis, and a word that could not be translated by the example sentence pattern base translation apparatus 16 are input as inappropriate words, and the words are translated It has a direct word translation device 18 and a target language text output unit 20 that creates a text sentence in the target language based on the result of appropriate translation by the translation device and outputs the text sentence.

  Further, the machine translation system 10 collects a sentence that could not be translated by the example sentence pattern-based translation device 16, and creates an appropriate translation for the collected sentence. A learning device 24 for checking and correcting the translation created by the automatic sentence collection unit 22 and a translation dictionary 26 are provided. The translation dictionary 26 stores a word bilingual dictionary 26a that stores words in the first language and a second language word that is a translation thereof, and an example sentence in the first language and an example sentence in the second language that is a translation thereof. The example sentence parallel translation dictionary 26b includes an example sentence pattern parallel translation dictionary 26c that stores example sentence patterns in the first language and example sentence patterns in the second language that are the translations of the first language example patterns. The translation dictionary 26 is used in the translation memory device 14, the example sentence pattern base translation device 16, and the word direct translation translation device 18. Note that the machine translation system of FIG. 1 is an example of a configuration, and may include another translation engine such as a chunk base.

  FIG. 2 is a block diagram showing the configuration of the example sentence pattern-based translation device 16 in FIG. The example sentence pattern-based translation device 16 includes a morpheme analysis unit 26 that performs morphological analysis on an input sentence, a mapping conversion unit 28 that performs mapping conversion on a sentence subjected to morpheme analysis using an example sentence pattern parallel translation dictionary 30, and A phrase translation unit 32 that translates a phrase such as each noun phrase, and a translation generation unit 34 that generates a final translation by applying the phrase translated by the phrase translation unit 32 to the translated sentence. The The example sentence pattern parallel translation dictionary 30 stores a large number of example sentence patterns that generalize phrases composed of two or more words in a sentence and their parallel translation sentences as a set. The mapping conversion unit 28 generates a sentence that generalizes the phrase in the input sentence, performs a search on the example sentence pattern parallel translation dictionary 30, and extracts the same example sentence pattern and a pair of the corresponding parallel sentence.

  FIG. 3 is a conceptual diagram showing a specific translation process in the example sentence pattern-based translation apparatus 16. In this example, Japanese is input as the first language, and a Chinese translation is obtained as the second language. The Japanese sentence input to the example sentence pattern-based translation device 16 is subjected to morphological analysis by the morphological analysis unit 26 (the numbers in the figure are part-of-speech IDs given to the morphemes) and supplied to the mapping conversion unit 28. The mapping conversion unit 28 generates a sentence in which phrases (phrases) in the sentence subjected to morphological analysis are generalized (NP1, NP2, and NP3 in the figure), and extracts example sentence patterns that match the sentence from the example sentence pattern parallel translation dictionary 30. . Then, the Chinese parallel translation example sentence pattern is specified. Next, the phrases generalized as NP1 to NP3 by the mapping conversion unit 28 are input to the phrase translation unit 32, and their parallel translation phrases are obtained. In the translated sentence generation unit 34, a parallel translation phrase is embedded in the parallel translation example sentence pattern thus obtained, and a Chinese translation for the input Japanese sentence is generated. The phrase translation accuracy in the phrase translation unit 32 has a significant effect on the translation accuracy in the final translated sentence.

  Patent Documents 1 to 4 and Non-Patent Documents 1 and 2 exist as related to the machine translation technology as described above. In Patent Document 1, when a first language sentence having a combination modification clause is translated into a second language sentence, information regarding the word order of the combination modification clause is given to a translation dictionary of the second language, and the information is used. It is disclosed that a translation result having a noun phrase in the correct word order is obtained by generating a second language sentence according to the grammatical rules of the second language. Patent Document 2 discloses a parallel noun phrase processing system that can perform correct parallel noun phrase processing in parallel noun phrase processing in a machine translation device. Patent Document 3 discloses a technique for extracting a noun phrase having a complex structure through structural analysis, dividing it into a main noun and other components, and generating a translation using conversion / generation rules in the grammar rules. Has been. Patent Document 4 discloses a technique in which an example sentence including an input phrase and its translation are extracted using an example sentence parallel translation dictionary, and a user selects a translation from the extracted information.

  Further, Non-Patent Document 1 shows that an example sentence and a translation sentence are each subjected to morphological analysis for an example sentence pair consisting of an example sentence in the first language and a translation sentence in the second language of the example sentence. We have reported a technique for extracting and extracting word translations that constitute an example sentence from a word bilingual dictionary, and collating the extracted translations with the translation words. Non-Patent Document 2 reports a technique for performing alignment using a statistical model between a word and a translation word composed of a set of example sentence pairs including an example sentence in the first language and a translation sentence in the second language of the example sentence. For example, the statistical model is a DICE coefficient, X2, mutual information, T-score, and the like.

JP-A-5-120329 JP-A-6-68131 JP-A-9-282320 Japanese Patent Laid-Open No. 2001-195404 Jin-Xia Huang, Key-Sun Choi. 2000.Using Bilingual Semantic Information in Chinese-Korean Word Alignment.Pacfic Asia Conference on Language, Information and Computation.PACLIC14, pp121-130.

Melamed, Dan. “A Word-to-Word Model of Translational Equivalence”. In Procs. Of the ACL97.pp 490-497. Madrid Spain, 1997.

  However, the techniques disclosed in Patent Documents 1 to 3 are largely dependent on the language analysis technology, and in the current situation where the analysis accuracy is not sufficient, the translation accuracy reaches the required level. There is no problem. The technique disclosed in Patent Document 4 is a translation support technique, and is not a technique for automatically extracting a phrase translation.

  Further, the technique disclosed in Non-Patent Document 1 uses a word alignment technique, but this technique has a very low recall rate and cannot process unregistered words that do not exist in the word bilingual dictionary. Furthermore, if the translation has ambiguity, it will be unclear which should be selected. In addition, as disclosed in Non-Patent Document 2, when the word alignment is performed by calculating the parameters in which the example sentences and the translation sentences co-occur with a statistical model utilizing the example sentence parallel translation dictionary, the accuracy is improved if the words have ambiguity. And the optimal alignment cannot be guaranteed.

  The present invention solves the above-described conventional problems, and provides a high-performance phrase translation apparatus that can be implemented in an example sentence pattern translation apparatus in a machine translation system. The phrase translation apparatus includes two or more phrase translation apparatuses. The purpose is to improve the translation accuracy of the final translation sentence in the machine translation system by making it possible to translate a phrase composed of words at high speed and with high accuracy.

  In this document, the term “phrase” includes a phrase composed of two or more words and a phrase that includes the phrase. Linguistically, a sentence includes a clause, a phrase, a clause includes a phrase, and a phrase does not include a phrase. In the present specification, it is defined that a phrase is not a linguistic definition, a word string including two or more words, and a phrase may include a phrase. Since the example sentence pattern-based translation device includes an example sentence parallel translation dictionary and an example sentence parallel translation dictionary, phrase translation can be easily realized by making maximum use of these language resources.

An example sentence set-based translation device according to claim 1 of the present invention provides an input phrase obtained by searching a first dictionary that stores example sentences in a first language and parallel translation example sentences in a second language as an example sentence parallel translation set. Holding means for holding an example sentence bilingual pair including a judgment means for judging whether the input phrase matches the example sentence , a first language example sentence pattern, and a second language parallel translation example sentence pattern A second dictionary for storing as an example sentence pattern parallel translation set; a search means for searching an example sentence pattern parallel translation set corresponding to the example sentence parallel translation set including the input phrase held in the holding means; and the holding means. The first language example sentence of the example sentence parallel translation set and the example sentence pattern of the first language of the example sentence pattern translation set searched by the search means, and the second language example sentence and the example sentence pattern translation in the example sentence parallel translation set In pairs And matching means for performing matching between 2 language sentence patterns, the extracting means for extracting a translation of input phrase based on the matching means matching results, if it is determined that coincides with the determination means, as the translation of the input phrase And output means for outputting the translated example sentence and outputting the translated sentence of the input phrase extracted by the extracting means when the judging means judges that they do not match .

  The example sentence set base translation device according to claim 2 of the present invention is the configuration according to claim 1, wherein the extraction unit is configured to specify an input phrase in an example sentence in the first language as an example sentence pattern in the first language. Corresponding to the variable part, the specific variable part in the example sentence pattern in the first language corresponds to the specific variable part in the example sentence pattern in the second language, and the specific variable part in the example sentence pattern in the second language is the first By corresponding to an example sentence in the language, a part of the example sentence in the first language corresponding to a specific variable part in the example sentence pattern in the second language is extracted as a translated sentence of the input phrase.

  A phrase translation apparatus according to claim 3 of the present invention includes the example sentence matching translation apparatus according to claim 1 or 2, and includes a plurality of translation units based on a plurality of translation techniques.

  The phrase translation device according to claim 4 of the present invention is the phrase translation device according to claim 3, comprising a dictionary-based translation unit based on a dictionary-based translation method and an example sentence matching translation device according to claim 1 or 2. An example sentence matching translation unit, a word alignment example sentence base translation part based on a word alignment example sentence base translation system, an example sentence set base translation part based on an example sentence set base translation system, an example sentence base translation part based on an example sentence base translation system, and a rule base translation system A rule-based translation unit, and input phrases are sequentially input to these translation units step by step.

An example sentence matching translation program according to claim 5 of the present invention includes a first dictionary that stores an example sentence in the first language and a parallel example sentence in the second language, which is a translation of the example sentence, and an example sentence pattern in the first language. An example sentence matching translation program using a second dictionary that stores the parallel translation example sentence pattern of the second language that is the translation as an example sentence pattern translation set, and includes an input phrase obtained by searching the first dictionary Corresponding to a first step of holding a parallel translation set, a second step of determining whether the input phrase and the example sentence match, and an example sentence parallel translation set including the input phrase held in the first step third step and, first and sentence of retained sentence translation pair of the first language in step third searched example sentence pattern translation in retrieving example sentence pattern translation pair from the second dictionary The first inter-language sentence patterns, and a fourth step and a fourth step of performing matching between the second language sentence pattern in the second language sentence and the example sentence pattern translation pairs in the sentence translation sets of When it is determined that the second step and the fifth step of extracting the translated sentence of the input phrase based on the matching result of the first and second steps match, the bilingual example sentence is output as the translated sentence of the input phrase, and the second step does not match If it is determined, the computer executes the sixth step of outputting the translated sentence of the input phrase extracted in the fifth step .

  According to the configuration of the first aspect, the translation accuracy is extremely high and the calculation suitable for high-speed processing in the information processing apparatus is performed, so that translation can be performed at high speed.

  According to the configuration of the second aspect, the translation of the input phrase can be extracted relatively easily based on the matching result.

  According to the configuration of the third aspect, the translation units are arranged so as to shift from a simpler basic translation to a more complicated translation, so that the translation can be speeded up and highly accurate.

  According to the configuration of the fourth aspect, since each translation unit is arranged so as to shift from a simpler basic translation to a more complicated translation, it is relatively easy to increase the speed and increase the translation including the existing technology. Accuracy is achieved.

  According to the configuration of the fifth aspect, the translation accuracy is extremely high, and an operation suitable for high-speed processing in the information processing apparatus is performed.

  The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings.

  The present embodiment relates to a phrase translation apparatus that can be implemented in the example sentence pattern base translation apparatus 16 used in the machine translation system 10 shown in FIG. FIG. 4 is a block diagram showing the configuration of the phrase translation apparatus of this embodiment. As shown in the figure, the phrase translation device 40 includes a plurality of stages of translation units 44 to 56 based on different translation systems, and a plurality of bilingual dictionaries 60 to 66 used in the translation units 44 to 56, which are input to the input unit 42. The phrase in the first language is configured to shift from a simpler translation to a more complicated translation, thereby speeding up the translation and increasing the accuracy. That is, the phrase appropriately translated in the preceding translation unit is output from the output unit 58 without being translated in the translation unit in the next stage, and only the phrase that has not been properly translated is input to the next translation unit. It is comprised so that.

  Specifically, the phrase in the first language input to the input unit is first subjected to translation processing by the dictionary-based translation unit 44, and when an appropriate translation phrase is not obtained here, the next example sentence The translation process is performed by the matching translation unit 47. Next, when an appropriate translation phrase cannot be obtained in the example sentence matching translation unit 47, the inputted phrase is subjected to morphological analysis in the morpheme analysis unit 48 and subjected to translation processing by the next word alignment example sentence base translation unit 50. Further, when an appropriate translation phrase cannot be obtained in the word alignment example sentence base translation unit 50, the input phrase is subjected to translation processing in the example sentence set base translation unit 52. If the example sentence set base translation unit 52 cannot obtain an appropriate translation phrase, the example sentence base translation unit 54 performs the translation process. The base translation unit 56 performs the translation process, and the result is output from the output unit 58.

  Next, a specific configuration and processing procedure of each translation unit 44 to 56 will be described.

  The dictionary base translation unit 44 searches the word / phrase parallel translation dictionary 60 for the input phrase, and outputs the parallel translation phrase when there is a matching phrase in the dictionary. In the word / phrase parallel translation dictionary 60, a word or phrase in the first language is used as a key, a dictionary set whose value is the parallel word or phrase in the second language, and a word or phrase in the second language is used as a key. It contains a dictionary set whose value is the bilingual word or phrase in one language. The dictionary-based translation unit 44 basically performs a two-step process, and first performs a search using a word / phrase in the first language as a key, extracts the parallel translation phrase, and if that is not successful Next, a search is performed using a word / phrase in the second language as a key, and the parallel translation phrase is extracted.

  FIG. 5 is a flowchart showing the procedure of translation processing in the dictionary base translation unit 44. As shown in the figure, for the input phrase P, a word / phrase bilingual dictionary set from language 1 to language 2 is searched in the first step S501. If there is a corresponding word or phrase in this dictionary set, the process proceeds from step S502 to step S503, and the parallel translation or translation of the corresponding word or phrase is extracted as the translation of the input phrase P and output. Output from the unit 58.

  On the other hand, if it is determined in step S502 that the corresponding word or phrase does not exist in this dictionary set, a word / phrase bilingual dictionary set from language 2 to language 1 is searched. If the corresponding word or phrase exists in the bilingual data in this dictionary set, the process proceeds from step S505 to step S506, and the original word of the corresponding word or phrase is extracted as the translated word of the input phrase P, and the output unit 58. If the corresponding word / phrase cannot be obtained from either of the two dictionary sets, the inputted phrase P is passed to the example sentence matching translation unit 46, which is the next translation unit, and subjected to processing there.

  FIG. 6 is a diagram showing an example of the data structure of the word / phrase parallel translation dictionary 60. In this example, a dictionary is assumed when Japanese is assumed as the first language and Chinese is assumed as the second language. The first dictionary set 60a configured with Japanese as the original language and Chinese as the translation, Chinese A second dictionary set 60b is shown, which is configured with Japanese as the original language and Japanese as the translated language. When the phrase P input to the phrase translation device 40 is Japanese, the original word column of the first dictionary set 60a is first searched, and the corresponding Chinese translation in the corresponding field is extracted as the translation of the phrase P. Is done. When the search by the first dictionary set 60a fails, the translated word column of the second dictionary set 60b is searched, and the corresponding Chinese original word in the corresponding field is extracted as the translated word of the phrase P.

  When the dictionary-based translation unit 44 cannot obtain a translated word for the input phrase, the input phrase is subjected to processing by the example sentence matching translation unit 47. The example sentence matching translation unit 47 uses the example sentence parallel translation dictionary 62 that associates the example sentences between the first language and the language 2, and if there is an example sentence that perfectly matches the input phrase P, the translated sentence of the example sentence is converted to the Pth sentence. Output as a bilingual translation. If there is no perfectly matched example sentence, if there is an example sentence including the input phrase P, the parallel translation pattern pair corresponding to the parallel translation example pair is extracted from the example sentence pattern parallel translation dictionary 63, and the extracted parallel pattern pair is extracted. Use to translate phrase P. The detailed configuration and operation of the example sentence matching translation unit 47 will be described later.

  Next, the function of the word alignment example sentence base translation unit 50 will be described. Phrases that could not be properly translated by the example sentence matching translation unit 47 are morphologically analyzed by the morphological analysis unit 48, that is, the words and parts of speech included in the inputted phrase are extracted and given semantic attributes, respectively. This is input data of the alignment example sentence base translation unit 50. The word alignment example sentence base translation unit 50 refers to the word alignment bilingual dictionary 64 for the translation candidate for the phrase subjected to the morphological analysis.

  The word alignment parallel translation dictionary 64 stores pairs of example sentences in the first language and parallel translation sentences in the second language, and includes word alignment information, that is, each word in the example sentence in the first language and the second language. Association information of each word in the bilingual sentence is added. Although a specific method for generating word alignment information will not be described here, various existing methods for generating word alignment information can also be used in this embodiment.

  FIG. 7 is a flowchart showing a translation processing procedure in the word alignment example sentence base translation unit 50. In step S701 in the figure, the first example sentence pair in the word alignment parallel translation dictionary 64 is extracted, and in step S702, it is determined whether the phrase P subjected to morphological analysis is included in the example sentence in the first language. This process is performed for all example sentence pairs in the dictionary until an example sentence pair including the phrase P appears. That is, if it is determined that the extracted example sentence pair does not include the phrase P, it is determined in step S703 whether all the example sentence pairs in the dictionary have been extracted. If not extracted, the next example sentence pair is extracted in step S704. Take an example sentence pair and compare with phrase P.

  If it is determined in step S702 that the extracted example sentence pair includes the phrase P, the process proceeds to step S705, and the word alignment information of the example sentence pair is referred to, and the phrase P in the example sentence is matched. The part in the translation corresponding to the part to be extracted is extracted as a translation candidate for the phrase P. Next, it is determined whether the word in the extracted translation candidate includes a word aligned with a portion other than the portion corresponding to the phrase P in the original example sentence (step S706). If there is no such word, that is, the alignment of the part corresponding to the phrase P in the example sentence and the translation candidate match completely, or other words are included in the translation candidate. If the word is not aligned with other words in the example sentence (empty correspondence), this translated sentence candidate is output as a translated sentence of phrase P in the present translation unit (step S707).

  On the other hand, if it is determined in step S707 that the word in the extracted translation candidate includes a word aligned with a part other than the part corresponding to the phrase P in the original example sentence, The final translation is determined to be inappropriate, and the process returns to step S703 to search for the next candidate. When the comparison with all example sentence pairs is completed and no corresponding translation is obtained as a result, the input phrase is passed to the next translation unit, ie, the example sentence set base translation unit 52, where the translation is performed. It becomes the object of processing.

  8 to 10 are diagrams showing examples of specific determination in step S707 of FIG. The examples of FIGS. 8 and 9 show examples in which the corresponding translation of the phrase P is obtained, and FIG. 10 shows the case where the corresponding translation is not obtained. FIG. 8 is an example in which a pair of the example sentence e1 and its corresponding translation t1 is extracted from the inputted phrase P in the figure. Here, for the part corresponding to the inputted phrase P in the example sentence e1 The Tg portion in the translation t1 is extracted as a translation candidate. In this example, the translation candidate Tg is composed only of tg1, tg2, and tg3 that are aligned with the words p1, p2, and p3 constituting the inputted phrase P. As a result, in step S707 of FIG. Will be output as the final translation.

  FIG. 9 is an example in which a pair of the example sentence e2 and its corresponding translation sentence t2 is extracted from the inputted phrase P in the figure. Here, a portion corresponding to the inputted phrase P in the example sentence e2 On the other hand, the Tg portion in the translation t2 is extracted as a translation candidate. In this example, the translation candidate Tg includes tg5 in addition to tg1 to tg4 that align with the words p1 to p4 constituting the input phrase P. However, since tg5 is not aligned with the other part of the example sentence e2 (empty correspondence), as a result, the Tg part of the translated sentence is output as the final translated sentence in step S707 of FIG.

  FIG. 10 is an example in which a pair of the example sentence e3 and its corresponding translation sentence t3 is extracted from the inputted phrase P in the figure. Here, for the part corresponding to the inputted phrase P in the example sentence e3, FIG. The Tg portion in the translation t3 is extracted as a translation candidate. In this example, the translation candidate Tg includes tg4 and tg5 in addition to tg1 to tg3 aligned with the words p1 to p3 constituting the inputted phrase P. Here, tg4 is not aligned with the other part of the example sentence e3 (empty correspondence), but tg5 is aligned with the word p4 of the other part of the example sentence e3. As a result, in step S707 of FIG. It is not output as a translation.

  Next, the function of the example sentence set base translation unit 52 will be described. Phrases that cannot be properly translated by the word alignment example sentence base translation unit 50 become input data of the example sentence set base translation unit 52. The example sentence set base translation unit 52 refers to the example sentence parallel translation dictionary 66 for translation candidates for the input phrase. The example sentence parallel translation dictionary 66 stores a large number of pairs of example sentences in the first language and parallel sentences in the second language. In order to improve the translation accuracy in this translation unit, it is preferable to register as many example sentence parallel translation sets as possible in the example sentence parallel translation dictionary 66.

  FIG. 11 is a block diagram functionally showing the internal configuration of the example sentence set base translation unit 52. In the figure, an example sentence set base translation unit 52 includes an example sentence parallel translation pair selection unit 1102 for selecting a plurality of example sentence parallel translation pairs including a phrase input from the example sentence parallel translation dictionary 66, and a common part between each example sentence parallel translation pair. A phrase pair extraction unit 1104 for extracting a set, a support level calculation unit 1106 for calculating a support level for the input phrase of a set of a plurality of extracted common parts, and a translation candidate based on the calculated support level A translation selection unit 1108 is provided for selecting a final translation from among the translations.

  When the inputted phrase is P, the example sentence parallel translation pair selection unit 1102 searches the example sentence group in the first language in the example sentence parallel translation dictionary 66, and finds all the combinations of example sentences including the phrase P and the corresponding translation sentences. select. The phrase pair extraction unit 1104 collates each example sentence parallel translation group selected by the example sentence parallel translation pair selection unit 1102 and extracts a set of common parts thereof. Specifically, the example sentences in the first language in each example sentence parallel translation set are collated to extract the common part, and the translation sentences in the second language are collated to extract the common part. When there are a plurality of common parts in each example sentence translation set, the lengths of the common parts are compared and the longest one is targeted. Further, general-purpose characters such as particles included in the sentence examples are registered as a prohibited character set and excluded from common parts to be extracted.

  The support level calculation unit 1106 calculates a support level for the input phrase of the extracted common part. More specifically, when the common part in the extracted combination of example sentences in each first language and the degree of matching between the input phrases are seen and they completely match (hereinafter referred to as strong support) The common part in the corresponding translation is taken as a translation candidate, and the support level is added. Also, when they do not match completely, the common part includes the input phrase, and the common part in the corresponding translation is a translation candidate (hereinafter referred to as weak support), The common part in the corresponding translation is set as a translation candidate, and the support level is added. This calculation is performed on all the extracted common parts, and the support level for the inputted phrase of each common part is integrated. In this way, the number of appearances of the translated sentence candidates is counted.

  The translation selection unit 1108 selects a final translation to be output from a plurality of translation candidates according to a predetermined reference value for the calculation result of the support level calculation unit 1106. Specifically, the two translated sentence candidates having the highest support are extracted and determined according to the following criteria. Here, T2 and T2 are two translation candidates, and their support levels are x and y (where x> y).

(1) If x <θ1, there is no appropriate candidate and output inappropriate translation. (2) If x> = θ1 and x-y> θ2, output T1 as a translation. (3) x> When T = θ1 and x / y> θ3, T1 is output as a translation. However, θ1, θ2, and θ3 are non-negative real numbers.

Next, a processing procedure in the example sentence set base translation unit 52 will be described. FIG. 12 is a flowchart showing a translation processing procedure in the example sentence set base translation unit 52. When the phrase output based on the fact that the translation unit at the preceding stage cannot be properly translated is input, the example sentence set base translation unit 52 accesses the example sentence parallel translation dictionary 66 and includes a plurality of example sentence parallel translation pairs including the phrase input therefrom. Is selected (step S1201).
(Step S1206). If the translation candidate does not satisfy a predetermined criterion, the translated phrase is not obtained in the present translation section, and the input phrase is output to the next translation section.

  Next, the translation process in the example sentence set base translation unit 52 will be described according to a mathematical description. In the following, the example sentences and their corresponding translation sentences stored in the example sentence parallel translation dictionary 66 are expressed as CS and JS, the example sentence parallel translation pair is expressed as S = CS <-> JS, and the candidate group of the selected parallel example sentence pair is expressed as BS. . Here, the example sentence CS and the translated sentence JS are expressed by a character string with a sequence of characters.

  The input phrase is represented by P. Here, P is also expressed as an ordered character string.

  If an arbitrary example sentence parallel translation pair is Sk and Sh, this is defined as follows.

  And the common part is defined as follows.

  Here, the following conditions are satisfied. CWSTOP represents a set of prohibited character strings in the first language, and JWSTOP represents a set of prohibited character strings in the second language.

  Next, when the language of the input phrase is the first language and the common part of Sh and Sk is as follows, it is expressed that Sh and Sk strongly support P <-> Tg. Tg is a candidate for translation of P.

  Here, if x example sentence pairs support P <-> Tg in the candidate sentence group BS of the parallel translation example pair, it is defined that the support level that is the translation candidate of the phrase P in which Tg is input is x. , SV (P <-> Tg) = x. Then, the translated sentence Tg having the maximum support degree SV (P <-> Tg) is taken as the translated sentence of the inputted phrase P, and is expressed as follows.

  Here, if the common part of Sh and Sk is as follows, it is expressed that Sh and Sk weakly support P <-> Tg. Also in this case, Tg is a candidate for translation of P.

  When the language of the input phrase is the second language and the common part of Sh and Sk is as follows, it is expressed that Sh and Sk strongly support Tg <-> P. In this case, Tg Is a translation candidate for P.

  Here, if x example sentence pairs support Tg <-> P in the candidate sentence group BS of parallel translation example sentence pairs, it is defined that the support level that is the translation sentence candidate of the phrase P in which Tg is input is x. , SV (Tg <-> P) = x. Then, the translated sentence Tg having the maximum support degree SV (Tg <-> P) is taken as the translated sentence of the inputted phrase P, and is expressed as follows.

  Here, if the common part of Sh and Sk is as follows, it is expressed that Sh and Sk weakly support Tg <-> P. In this case, Tg is also a candidate for translation of P.

  Next, a specific example of translation processing in the example sentence set base translation unit 52 will be shown. In the example, the input Chinese phrase is translated into Japanese. FIGS. 13 to 16 are examples showing specific translation processing performed in the example sentence set base translation unit 52.

  FIG. 13 shows an example of selecting example sentence parallel translation pairs (S1, S2, S3, S4, S5,...) When a Chinese phrase P is input to the example sentence set base translation unit. It can be seen that the input phrase P is included in the example sentences C1, C2, C3, C4, C5,.

  FIG. 14 shows a specific example of calculating the support level in the common part of the selected example sentence parallel translation pair. The support level in the common part of each example sentence parallel translation pair is determined, and as a result, the support level of the corresponding translated sentence is added.

  FIG. 15 shows the result of the support level as a table. As a result, the degree of support for each translated sentence candidate is known.

  In FIG. 16, two translation candidates with high support are extracted from the result of the support, and finally, it is determined that T1 exceeds a predetermined standard, and the final translation is determined. Yes.

  Returning to FIG. 4, the phrase that has not been properly translated by the example sentence set base translation unit 52 is passed to the example sentence base translation unit 54 of the next stage, and undergoes the translation processing here. The example sentence base translation unit 54 searches the example sentence parallel translation dictionary 66, extracts example sentences matching the inputted phrase, and outputs the translated sentence as a translated sentence of the inputted phrase. As a specific translation method of the example sentence base translation unit 54, various conventional translation methods can be employed.

  Phrases that have not been properly translated by the example sentence base translation unit 54 are transferred to the next rule base translation unit 56 and are subjected to translation processing here. The rule base translation unit 56 performs analysis of the first language (morphological analysis, syntax / semantic analysis, etc.), converts the analysis result into the second language based on a large number of rules created manually, and further Generates translations in two languages. In the present embodiment, various conventional translation methods can be adopted as a specific method of the rule base translation unit 56.

  Next, the detailed configuration of the example sentence matching translation unit 47 will be described with reference to FIG. As shown in the figure, the example sentence matching translation unit 47 translates a phrase input using the example sentence parallel translation dictionary 62 and the example sentence pattern parallel translation dictionary 63. First, the data structure of these dictionaries will be described.

  FIG. 18 shows an example of the data structure of the example sentence parallel translation dictionary 62. Each record includes a first language example sentence T1 and a second language example sentence T2 that is a translation of the example sentence T1.

  Next, the data structure of the example sentence pattern parallel translation dictionary 63 will be described. FIG. 19 shows an example data structure of example sentence patterns. In the figure, an example sentence pattern PE is a pattern for classifying example sentences SE1 to SE4.

  The example sentence pattern PE is a fixed part PF composed of words or clauses common to the classified example sentences and a word or clause that is not the fixed part PF, but has a common part of speech between the classified example sentences. It is comprised with the variable part PV comprised by this. The variable part PV represents a word or a phrase having a common part of speech using symbols such as V1 and V2.

  Therefore, the example sentence pattern PE is composed of a character string common to the categorized example sentences, and the variable portion PV is composed of a symbol representing a character string not common to the categorized example sentences (hereinafter simply referred to as a non-common character string). That is, the non-common character string refers to a character string other than the common character string constituting the example sentence pattern.

  Here, a clause is a sentence derived by a follower conjunction and a relative phrase in terms of grammar, and is a sentence in which a subject and a predicate are paired and completed. However, in this embodiment, the words that are verbs, adjectives, and adjective verbs, and the particles that are used in conjunction with the words, auxiliary verbs, and auxiliary verbs are referred to as clauses. And adjective verb clauses. Moreover, the part of speech of a clause means the division which classified the clause into any of a verb clause, an adjective clause, and an adjective verb clause.

  Specifically, as shown in FIG. 19, the clauses SC1 to SC4 “PC” and PC are words that are verbs “pass”, words that are particle “TE”, and “please” Consists of words that are auxiliary verbs.

  Moreover, the parts SC1 to SC4 composed of the word “pass” as a verb and the words “te” and “please” used accompanying the word “pass” and the part of speech of the PC are called a verb clause.

  The fixed part PF includes not only words or clauses common to example sentences, but also FIX content information indicating synonyms thereof, TYPE information indicating whether the part is a variable part or a fixed part, and parts of speech of words constituting the fixed part. It consists of part-of-speech information to be represented, language system attribute names that are information representing the vocabulary system to which the words constituting the fixed part belong.

  The variable part PV includes variable name information that is information representing a common part of speech, TYPE information indicating whether the part is a variable part or a fixed part, a lexical system attribute name of the variable part, and the like. Examples of vocabulary languages include Japanese vocabulary (J) and Chinese vocabulary (C).

  In this embodiment, the variable name information includes a noun phrase indicating that the common part of speech is a noun (for example, a variable name of a noun phrase; NP, a variable name ID; 1), and an adjective phrase indicating an adjective ( For example, a variable name of an adjective phrase; AP, a variable name ID; 2), and an adverb phrase indicating that it is an adverb (for example, a variable name of an adverb phrase; DP, a variable name ID; 3).

  In the present embodiment, the variable part PV has been described as being composed of words or clauses whose parts of speech are common among categorized example sentences. However, the present invention is not limited to this, and represents the contents of common properties. Embodiments composed of words or clauses can be employed. As a specific example of a word or a clause representing the content of the common property, for example, a word or a clause representing time, quantity, place name, or personal name can be cited.

  Next, an example data structure of the example sentence pattern parallel translation dictionary 63 will be described with reference to FIG. As shown in the figure, the example sentence pattern parallel translation dictionary 63 is composed of records 1 to n. Records 1 to n include an example sentence pattern T1 expressed in the first language, an example sentence pattern T2 as a translation pattern obtained by translating the example sentence pattern T1 into the second language, and a pair (set) of the example sentence pattern T1 and the example sentence pattern T2. The identification ID is stored in association with correspondence information F2 indicating the correspondence between character strings such as words constituting the example sentence patterns T1 and T2.

  The correspondence information F2 stored by records 1 to n will be described. Here, an example will be described in which the example sentence pattern T1 is composed of five character strings a1 to a5 such as words, and the example sentence pattern T2 is composed of six character strings b1 to b6 such as words. I do.

  The correspondence relationship information F2 represents the correspondence relationship between character strings using the order in which the character strings are used in the example sentence pattern T1 and the example sentence pattern T2 as a translation.

  Specifically, if the meaning represented by the nth character string an used in the example sentence pattern T1 and the meaning represented by the character string bm used in the mth example sentence pattern T2 are the same, Is represented as “(n: m)”.

  Also, when the meaning represented by the nth character string an used in the example sentence pattern T1 and the meanings represented by the two character strings used in the mth and m + 1th letters in the example sentence pattern T2 represent the same meaning Is represented as “(n: m, m + 1)”.

  Conversely, the meaning represented by the two character strings an and an + 1 used in the nth and n + 1th in the example sentence pattern T1, and the meaning represented by the character string bm used in the mth sentence in the parallel example sentence pattern T2. Are represented as “(n, n + 1: m)”.

  Similarly, the meanings represented by the two character strings an and an + 1 used in the nth and n + 1th in the example sentence pattern T1, and the two characters used in the mth and m + 1th in the example sentence pattern T2. When the meaning represented by the column represents the same meaning, it is represented as “(n, n + 1: m, m + 1)”.

  In this embodiment, when one character string used in the example sentence pattern T1 and one character string used in the example sentence pattern T2 represent the same meaning, one character string and two character strings have the same meaning. In the case of representing two character strings and one character string representing the same meaning, the description method for expressing the correspondence when two character strings and two character strings represent the same meaning has been explained. It is not limited.

  For example, when j (j> = 1) character strings and k (k> = 1) character strings have the same meaning, generally, “(n, n + 1,..., N” + j: m, m + 1,..., m + k) ”can be adopted.

  Furthermore, when a character string having the same meaning as that represented by the nth character string an used in the example sentence pattern T1 is not used in the example sentence pattern T2, it is represented as “(n: 0)”. Conversely, if a character string having the same meaning as the m-th character string bm used in the example sentence pattern T2 is not used in the example sentence pattern T1, it is represented as “(0: m)”.

Specific correspondence information shown in FIG.
F2 (T1, T2) = {(1: 1), (2: 3), (3: 4,5), (5: 6), (4: 0), (0: 2)}
Will be described. Correspondence information F2 (T1, T2) has the same meaning as the first character string b1 used in the example sentence pattern T2 in the meaning of the first character string a1 used in the example sentence pattern T1. Correspond. Similarly, the meaning of the character string a2 used second in the example sentence pattern T1 is the same as the meaning of the character string b3 used third in the example sentence pattern T2, and is used third in the example sentence pattern T1. The meaning of the character string a3 is the same as the meanings of the fourth and fifth character strings b4 and b5 used in the example sentence pattern T2, and the meaning of the fifth character string a5 used in the example sentence pattern T1 is the example sentence. The meaning of the character string b6 used in the sixth in the pattern T2 is the same as that of the character string b6. In addition, a character string having the same meaning as a4 used in the fourth example pattern T1 is not used in the example pattern T2, and a character string having the same meaning as the second character string b2 used in the example pattern T2. This represents a correspondence that is not used in the example sentence pattern T1. Any expression may be used as long as the correspondence relationship can be expressed, and the translation apparatus according to the present invention is not limited to the expression described above.

  As shown in FIG. 17, the example sentence matching translation unit 47 includes a first language example sentence (translation example sentence candidate) including a phrase input by the example sentence part matching translation unit 72 with reference to the example sentence parallel translation dictionary 62 from the input unit 71. Search and hold it in the holding unit 621, and the determination unit 73 determines whether or not the input phrase and the example sentence completely match, and if it does not match, refers to the example sentence pattern parallel translation dictionary 63 and translates the latter part It is comprised including. If the determination unit 73 completely matches, the second language example sentence of the parallel translation example sentence candidate is output from the output unit 78 as a translation of the input phrase P. The latter part includes a first holding unit 621 that holds bilingual example sentence candidates, an example sentence pattern parallel translation dictionary 63, a second holding unit 631 that holds bilingual example sentence pattern pair candidates, an example sentence pattern searching unit 75, and an example sentence pattern matching unit 76. 77 and an output unit 78.

  When the judgment unit 73 does not agree, the example sentence pattern search unit 75 uses the example sentence pattern held by the holding unit 621 for the input phrase P obtained by performing morphological analysis on the input phrase by the morphological analysis unit 74. The bilingual dictionary 63 is searched, and bilingual example sentence pattern pair candidates including the input phrase P are acquired and stored in the holding unit 631. The example sentence pattern matching unit 76 performs matching using the bilingual example sentence candidate and the bilingual example sentence pattern pair candidate, and the translated sentence extracting unit 77 extracts a translated sentence using the result, and the translated part is output by the output unit 78. In FIG. 17, the morpheme analysis unit 74 is described inside for convenience, but may be provided outside so that the morpheme analysis is performed before being input to the input unit 71.

  Next, the translation processing operation of the example sentence matching translation unit 47 configured as described above will be described with reference to the flowcharts of FIGS.

  As described above, the example sentence part matching unit 72 receives the example sentence parallel translation dictionary 62 in which the parallel example sentences including pairs of example sentences in the first language and example sentences in the second language, which are the translated sentences, are stored. The bilingual example sentence candidate Eset (P) including the phrase P input from is searched and held in the holding unit 621 (S1). The determination unit 73 determines whether or not the bilingual example sentence candidate Eset (P) is empty (NULL), and if it is empty, outputs the result from the output unit 78 (S2, S4). If it is not empty, it is determined whether there is an example sentence A in the first language equal to the input phrase P in the translation example sentence candidate Eset (P), and if there is, the second language example sentence as a translation of the example sentence A in the first language is input phrase The result of translation of P is output from the output unit 78 (S3, S5). If it is not step S3, the process proceeds to the next subsequent stage.

  The example sentence pattern search unit 75 extracts one example sentence pair (SC, SJ) from the parallel translation example sentence candidate Eset (P) stored in the holding unit 621, and translates it from the example sentence pattern translation dictionary using the example sentence SC of the first language. The pattern pair candidate Pset (P) is searched and held in the holding unit 631 (S6, S7). The example sentence pattern matching unit 76 determines whether or not the bilingual pattern pair candidate Pset (P) is empty. If it is not empty, one bilingual pattern pair (AC, AJ) is extracted from the bilingual pattern pair candidate Pset (P) (S8). , S11). The example sentence pattern matching unit 76 matches the example sentence SC in the first language and the first language pattern AC of the translation pattern pair, and the second example sentence SJ in the second language and the second translation pattern pair as matching of the example sentence and the example sentence pattern. Matching between language patterns AJ is obtained (S12). Next, whether the phrase P included in the first language example sentence SC matches the items ACi, ACi + 1,... ACi + h of the first language pattern AC of the parallel translation pattern pair (h> = 0) Whether or not (S13). If not matched, the process proceeds to step S9. If matched and supported, the first language pattern AC items ACi, ACi + 1,... ACi + h are the second language pattern AJ items. It is determined whether matching with AJj, AJj + 1,... AJj + k is satisfied (k> = 0) (S14). If not matched, the process proceeds to step S9, and if matched, the items AJj, AJj + 1,... AJj + k of the pattern AJ in the second language are between the example sentences SJ in the second language. It is determined whether matching to SJt, SJt + 1,... SJt + s (s> = 0) (S15). If it does not match and does not correspond, it will progress to Step S9, and if it matches and it corresponds, processing will be passed to translation translation part 77. In the translation extraction unit 77, for the input phrase P included in the example sentence SC of the first language, matching information to the items ACi, ACi + 1,. Matching information to items AJj, AJj + 1, ... AJj + k of second language pattern AJ, and items of pattern AJ of second language for items ACi, ACi + 1, ... ACi + h of one language pattern AC For AJj, AJj + 1,... AJj + k, a translation of the input phrase P is obtained using matching information to SJt, SJt + 1,... SJt + s between example sentences SJ in the second language (S16). The translated text extracting unit 77 outputs a character string from SJt to SJt + s from the output unit 78 as a translated text of the input phrase P (S16).

  When it is determined in step S8 that the parallel translation pattern pair candidate Pset (P) is empty, the example sentence pattern matching unit 76 determines whether the parallel translation example sentence candidate Eset (P) is empty (S9). If it is not empty, it returns to step S6 about another bilingual example sentence pair, and repeats the above-mentioned process. When the bilingual example sentence candidate Eset (P) is empty, an empty result is output from the output unit 78 via the translation extracting unit 77 (S10).

  Next, the phrase translation process described above will be described using a specific example. First, an example of translating from Chinese to Japanese as an input phrase will be described with reference to FIG. The input phrase is Chinese “FX-like Tanaka ▲ long ▼” which means “FX's General Manager Tanaka”. In step (1), an example sentence pair including an input phrase is retrieved from the example sentence parallel translation dictionary 62 and extracted. E1 and E2 in the figure are extraction results. Here, for simplicity of explanation, a case where translation is possible using E1 will be described. In step (2), the corresponding pattern pair is searched from the example sentence pattern parallel translation dictionary 63 using the example sentence SC1 of the first language. As a result of the search, the distance value D is D (SC1, AC) = 0.0. A bilingual pattern pair (AC, AJ) is searched. Next, the first language example sentence SC1 of the example sentence pair and the first language example sentence pattern AC of the parallel translation pattern pair are matched. The phrase P included in the first language example sentence SC1 matches the variable item NP2 of the first language example sentence pattern AC. Accordingly, the matching between the second language example sentence SJ1 of the second language example sentence pair and the second language example sentence pattern AJ of the parallel translation pattern pair is subsequently obtained. In step (3), the phrase P of the first language example sentence SC1 matches NP2 of the first language example sentence pattern AC. NP2 of the first language example sentence pattern AC matches NP2 of the second language example sentence pattern AJ. NP2 in the second language example sentence pattern AJ matches "FX Director Tanaka" in the second language example sentence SJ1. From these, the translation of the input phrase P is “Director Tanaka of FX” in the example sentence SJ1 in the second language.

  Next, an example of translating from Japanese to Chinese as an input phrase will be described with reference to FIG. The input phrase is “apple left over by the child”. In step (1), an example sentence pair including an input phrase is retrieved from the example sentence parallel translation dictionary 62 and extracted. E1 and E2 in the figure are extraction results. Here, the case where translation was possible using E1 will be described. In step (2), the corresponding pattern pair is searched from the example sentence pattern parallel translation dictionary 63 using the example sentence SJ1 in the first language. As a result of the search, the distance value D is D (SJ1, AJ) = 0.0. A bilingual pattern pair (AC, AJ) is searched. Next, the first language example sentence SJ1 of the first language of the example sentence pair and the first language example sentence pattern AJ of the parallel translation pattern pair are matched. The phrase P included in the first language example sentence SJ1 matches the variable item NP2 of the first language example sentence pattern AJ. Therefore, the matching between the second language example sentence SC1 of the second language example sentence pair and the second language example sentence pattern AC of the parallel translation pattern pair is subsequently obtained. In step (3), the phrase P of the first language example sentence SJ1 matches NP2 of the first language example sentence pattern AJ. NP2 of the first language example sentence pattern AJ matches NP2 of the second language example sentence pattern AC. The NP2 of the second language example sentence pattern AC matches the Chinese “孩子 吃 剩下 的 苹果” of the second language example sentence SC1. From these, the translation of the input phrase P is “孩子 吃 剩下 的 苹果” in the second language example sentence SC1.

  As described above, the example sentence matching translation unit 47 includes the example sentence pattern translation dictionary and the example sentence pattern translation dictionary in the example sentence pattern base translation apparatus 16 in which the phrase translation apparatus 40 is used. Utilizing this, phrase translation can be realized relatively easily without providing a special dictionary.

  At the end of the description of the example sentence matching translation unit 47, an example of matching means for example sentences and example sentence patterns will be described. Such matching means will be described with reference to FIGS. The translation apparatus 1001 included in the configuration of the translation system 10a in FIG. 25 performs matching processing between example sentences and example sentence patterns. FIG. 26 is a detailed block diagram showing the configuration of the main part of the translation apparatus 1001.

  First, the analysis unit 1200 performs morphological analysis on document information in the first language input from the input device 3000, performs processing such as separating words constituting the input sentence, and adding part of speech of the words.

  The search unit 1300 refers to the analysis result of the analysis unit 1200 and the storage contents of the storage unit 1100 to extract example sentence pattern candidate (one or more) in the first language similar to the input sentence.

  The conversion unit 1401 obtains a clause of the input sentence using the input sentence of the first language and the extracted example sentence pattern of the first language. In order to obtain a difference between the first language input sentence and the first language example sentence pattern, the first language input sentence is converted based on the first language example sentence pattern. Differences from the conversion unit 1400 of the first embodiment will be described later.

  The calculation unit 1500 obtains the distance as the difference between the word / section string of the first language input sentence converted by the conversion unit 1401 and the candidate for the first language example sentence pattern. A conversion mapping between the word / section string of the first language input sentence that determines the minimum difference and the extracted example sentence pattern candidate of the first language is obtained. Here, there may be multiple example sentence pattern candidates that give the distance value as the minimum difference value, and there are multiple conversion maps between the example sentence pattern candidate that determines the minimum difference value and the word / section column of the input sentence There is also.

  The extraction unit 1600 obtains the correspondence between the word / section string of the first language input sentence and the first language example sentence pattern. The correspondence (mapping) between the word / section string of the first language input sentence and the extracted example sentence pattern candidate of the first language is obtained. The extraction unit 1600 includes an actual extraction unit 1610 (not shown), a relationship specifying unit 1620 (not shown), and a relationship selection unit 1630 as internal configurations. The actual extraction unit 1610 extracts one pattern from the example sentence pattern searched by the search unit 1300, and extracts the example sentence pattern having the closest distance between the input sentence and the example sentence pattern, which is the second index calculated by the calculation unit 1500. To do. The relationship specifying unit 1620 specifies the correspondence between the converted character string that forms the input sentence S ′ and the character string that forms the example sentence pattern A that classifies the input sentence S. When there are a plurality of correspondence relationships between the word / section string of the first language input sentence and the extracted example sentence pattern candidates of the first language, the last-stage relationship selection unit 1630 selects an appropriate correspondence relationship. That is, from the relationship specifying unit 1620, the correspondence set is obtained, and the converted input sentence, example sentence pattern, parallel example sentence pattern, and correspondence relation information are obtained. Correspondence information having the maximum assigned score is selected from the acquired correspondence information.

  The determination correction unit 1800 includes a determination unit 1810, a correction unit 1820, and an optimum relationship selection unit 1830. The determination correction unit 1800 determines the selection result with reference to the selection result of the relationship selection unit 1630 and the storage content of the storage unit 1100. If correction is necessary, the correction unit 1800 corrects the result and returns it to the calculation unit 1500. A correspondence relationship is obtained.

  The determination unit 1810 determines whether to recalculate the correspondence between the word / section column of the first language input sentence and the first language example sentence pattern for the selection result of the relationship selection unit 1630.

  The correction unit 1820 corrects the word / section string of the first language input sentence, calculates again the difference between the corrected word / section string of the first language input sentence and the first language example sentence pattern, and In order to determine the distance value, the correspondence between the word / section string of the first language input sentence and the first language example sentence pattern is obtained.

  The optimal relationship selection unit 1830 selects an optimal translation relationship from a set of correspondence relationships between all example sentence pattern candidates and the word / section columns of the first language input sentence. The correspondence relationship between the example sentence pattern parallel translation bear number obtained by this selection, the word / section string of the first language input sentence, and the extracted example sentence pattern of the first language is output.

  The storage unit 1100 has a data configuration similar to that of the first embodiment, and the stored contents include an example sentence parallel translation dictionary and an example sentence pattern parallel translation dictionary. The example sentence pattern translation dictionary stores, for example, example sentence patterns, translated sentence patterns, and correspondences between example sentence patterns and translated sentence patterns as a set. This is called an example sentence pattern parallel translation pair.

  The translation unit 1700 corresponds to the correspondence between the word / section column of the first language input sentence selected by the optimum relationship selection unit 1830 and the first language example sentence pattern, the first language example sentence pattern and the translation corresponding to the pattern. Using the correspondence between the example sentence patterns in the language, the correspondence between the word / section string of the first language input sentence and the example sentence pattern in the target language is obtained, and the translation is generated by translating the variable part.

  Next, operations of main parts of the translation apparatus 1001 will be described with reference to the flowcharts of FIGS.

  When the input sentence S that has been subjected to morphological analysis is input to the search unit 1300, the search unit 1300 displays example sentence pattern candidates Aset corresponding to the input sentence s, that is, Dmin, F1set (S), F1set (S '), F1set (S ', A) and the like are initialized (S301, S302). Further, the example sentence pattern candidate A is extracted from the example sentence pattern candidate Aset, and the conversion unit 1401 sets the input sentence S corresponding to the pattern A as S ′ (S303, S304). The calculation unit 1500 obtains the distance D1 between the input sentences S ′ and A. It is determined whether the obtained distance D1 is smaller than the Dmin minimum value (S306). If it is smaller, F1set (S ′, A) and F1set (S ′) are set to a null value (NULL), that is, an empty value, and D1 is set to Dmin. Correspondence (mapping) is obtained (S307, S309).

Further, a map for determining the obtained distance value Dim is stored in F1set (S ′, A). The selection unit 1630 deletes an inappropriate mapping in F1set (S ′, A) (S310). The obtained F1set (S ′, A) is put into F1set (S ′).
That is, F1set (S ′) = F1set (S ′) + F1set (S ′, A)

  Thereafter, or when it is determined in step S306 that it is large, it is determined whether or not all candidates for Aset have been processed. If there is any unprocessed, candidate A is extracted and the above processing is performed. Proceed to the next step.

Next, the determination unit 1810 extracts one map F1i (S ′, A) from F1set (S ′), and determines whether it is necessary to recalculate F1i (S ′, A). (S311 and S312). When it is necessary to recalculate, the correcting unit 1820 corrects the sentence S ′ with reference to F1i (S ′, A) and the candidate A, and sets it as the corrected sentence S ″ (S313). ).
That is, F1set (S ′, A) = F1set (S ′, A) −F1i (S ′, A)

  The difference between the corrected sentence S ″ and the candidate A is obtained by the calculation unit 1500 (S314). The distance value as the obtained difference is defined as D2. It is determined whether the distance value D2 is smaller than the minimum value Dmin (S315). If it is smaller, the correspondence (mapping) F1set (S ″, A) between the sentence S ″ and the candidate A is obtained (S316). After that, if Dmin = D2, set F1set (S) = F1set (S) + F1set (S '', A), and if Dmin> D2, F1set (S) = F1set (S ', A) and Dmin = D2 (S317).

  After the process of step S317 is completed, if it is determined in step S315 that it is large, or if it is determined in step S312 that recalculation is not necessary, it is determined whether all mappings of F1set (S ′) have been processed. (S318). If unprocessed, the process returns to step S312 to perform the process. If processed, if F1set (S) is NULL, set F1set (S) = F1set (S ′, A), and then select the optimum mapping (corresponding relationship) from F1set (S) by the optimum relationship selection unit 1830. ) And the obtained mapping is put into F1res (S, A) (S319, S320).

  As described above, in the phrase translation device 40 (see FIG. 4), phrases input to the input unit 42 are sequentially input to the translation units 44 to 56 step by step until the translation is obtained. Will be processed. Since the order of each translation unit is basically arranged so as to shift from a simpler translation to a more complex translation, the translation can be speeded up and increased in accuracy.

  FIG. 29 is a block diagram showing one hardware configuration of the phrase translation apparatus. The phrase translation device preferably includes an input device 1700, a display device 1702, a main storage device 1704, a storage device 1706, a central processing unit (CPU) 1708, and a bus 1710 connecting them.

  The input device 1700 includes a keyboard for inputting information by key operation, a scanner for optically reading a document or the like written on a manuscript, an input interface for inputting data from an external device, an external memory, or the like. The display device 1702 includes a display that displays user input, translation results, and the like. The main storage device 1704 includes a ROM or a RAM, and stores a program for controlling the operation of each unit shown in FIG. The storage device 1706 includes, for example, a large-capacity storage device such as a hard disk, and stores data such as various dictionaries 60 to 66 such as an example sentence parallel translation dictionary. The central processing unit 1708 controls each unit according to a program stored in the main storage device 1704.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments according to the present invention, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  The phrase translation apparatus according to the present invention is used in an example sentence pattern translation apparatus in a machine translation system.

It is a figure which shows the example of whole structure of the machine translation system which concerns on an example sentence base machine translation system. It is a block diagram which shows the structure of the example sentence pattern base translation apparatus 16 in FIG. FIG. 5 is a conceptual diagram showing a specific translation process in the example sentence pattern base translation apparatus 16. It is a block diagram which shows the structure of the phrase translation apparatus of the Example of this invention. 5 is a flowchart showing a procedure of translation processing in the dictionary base translation unit 44. It is the figure which showed an example of the data structure of the word / phrase parallel translation dictionary. It is a flowchart which shows the procedure of the translation process in the word alignment example sentence base translation part. It is a figure which shows the example from which the pair of example sentence e1 and its corresponding translation t1 was extracted with respect to the input phrase P. FIG. It is a figure which shows the example from which the pair of example sentence e2 and its corresponding translation t2 was extracted with respect to the input phrase P. FIG. It is a figure which shows the example from which the pair of example sentence e3 and its corresponding translation t3 was extracted with respect to the input phrase P. FIG. 3 is a block diagram schematically showing an internal configuration of an example sentence set base translation unit 52. FIG. It is a flowchart which shows the procedure of the translation process in the example sentence set base translation part. It shows an example of selecting an example sentence parallel translation pair when a Chinese phrase P is input to the example sentence set base translation unit. The example which calculates the support in the common part of the selected example sentence parallel translation pair is shown. It is the figure which represented the tabulation result of the support degree in a table. It is an example showing a specific translation process performed in the example sentence set base translation unit 52. It is a block diagram which shows one hardware constitutions of a phrase translation apparatus. It is explanatory drawing which shows the data structure of an example sentence parallel translation dictionary. It is explanatory drawing which shows the data structure of an example sentence pattern. It is explanatory drawing which shows the data structure of an example sentence pattern parallel translation dictionary. It is a flowchart which shows the process procedure front part of an example sentence matching translation part. It is a flowchart which shows the process procedure latter part of an example sentence matching translation part. It is explanatory drawing which shows the example of translation from Chinese to Japanese. It is explanatory drawing which shows the example of translation from Japanese to Chinese. It is a block diagram which shows the whole structure of the translation system containing the translation apparatus 1001 which can be used for the matching of an example sentence and example sentence pattern. 3 is a block diagram showing a detailed configuration of a main part of translation apparatus 1001. FIG. It is a flowchart which shows the main part process sequence front of a translation apparatus. It is a flowchart which shows the main part process sequence latter part of a translation apparatus. It is a block diagram which shows one hardware constitutions of a phrase translation apparatus.

Explanation of symbols

10: machine translation system 12: source language text sentence input unit 14: translation memory device 16: example sentence pattern base translation device 18: word direct translation translation device 20: target language text output unit 22: automatic translation inappropriate sentence collection unit 24: learning Device 26c: Example sentence pattern parallel translation dictionary 26a: Word parallel translation dictionary 26b: Example sentence parallel translation dictionary 26: Morphological analysis section 26: Translation dictionary 28: Mapping conversion section 30: Example sentence pattern parallel translation dictionary 32: Phrase translation section 34: Translation sentence generation section 40: Phrase Translation device 42: input unit 44: dictionary base translation unit 47: example sentence matching translation unit 48, 74: morpheme analysis unit 50: word alignment example sentence base translation unit 52: example sentence set base translation unit 54: example sentence base translation unit 56: rule base Translation unit 58: Output unit 60: Word / phrase parallel translation dictionary 62: Example sentence parallel translation dictionary 6211: First holding unit 63: Example sentence translation Turn bilingual dictionary 631: Second holding unit 64: Word alignment bilingual dictionary 66: Example sentence parallel translation dictionary 72: Example sentence part matching translation unit 73: Judgment unit 75: Example sentence pattern search unit 76: Example sentence pattern matching unit 77: Translation sentence extraction unit 1102: Example sentence parallel translation pair selection unit 1104: Phrase pair extraction unit 1106: Support level calculation unit 1108: Translation sentence selection unit 1700: Input device 1702: Display device 1704: Main storage device 1706: Storage device 1708: Central processing unit (CPU)
1710: Bus

Claims (5)

Holding means for holding an example sentence parallel translation set including an input phrase obtained by searching a first dictionary for storing a first language example sentence and a second language parallel translation example sentence as an example sentence parallel translation set;
Determining means for determining whether the input phrase and the example sentence match;
A second dictionary that stores example sentence patterns of the first language and parallel translation example sentence patterns of the second language, which are translations thereof, as example sentence pattern translation sets;
Search means for searching an example sentence pattern parallel translation set corresponding to the example sentence parallel translation set including the input phrase held in the holding means;
A first language example sentence of the example sentence parallel translation set held by the holding means and an example sentence pattern of the first language of the example sentence pattern parallel translation set searched by the search means, and an example sentence of the second language in the example sentence parallel translation set; Matching means for performing matching between example sentence patterns of the second language in the example sentence pattern parallel translation set;
Extraction means for extracting a translation of input phrase based on the matching result of the match in g unit,
When the judgment means determines that they match, the bilingual example sentence is output as a translation of the input phrase, and when it is determined that the judgment means does not match, the output of the input phrase extracted by the extraction means is output Means,
Example sentence matching translation device.   The extraction means corresponds to an input phrase in an example sentence in the first language corresponding to a specific variable part in the example sentence pattern in the first language, and a specific variable part in the example sentence pattern in the first language is an example sentence pattern in the second language. The specific variable part in the second language corresponds to the specific variable part in the second language, and the specific variable part in the second language example pattern corresponds to the example sentence in the first language. 2. The example sentence matching translation apparatus according to claim 1, wherein the example sentence part of the first language corresponding to the variable part is extracted.   A phrase translation device comprising the example sentence matching translation device according to claim 1 or 2 and comprising a plurality of translation units based on a plurality of translation techniques.   The phrase translation device includes a dictionary-based translation unit using a dictionary-based translation method, an example sentence matching translation unit including the example sentence matching translation device according to claim 1, and a word alignment example sentence-based translation unit based on a word alignment example sentence translation method And an example sentence pattern base translation part based on an example sentence pattern base translation system, an example sentence pattern base translation part based on an example sentence pattern base translation system, and a rule base translation part based on a rule base translation system. The phrase translation device according to claim 3, wherein the phrase translation device is configured to be input step by step to the translation unit. A first dictionary that stores example sentences in the first language and their parallel translation example sentences in the second language as an example sentence parallel translation set, and example sentence patterns in the first language example sentence patterns and their parallel translation example sentence patterns in the second language An example sentence matching translation program using a second dictionary stored as a parallel translation set,
A first step of holding an example sentence parallel translation set including an input phrase obtained by searching the first dictionary;
A second step of determining whether the input phrase matches the example sentence;
A third step of searching for an example sentence pattern translation pair from the second dictionary corresponding to the example sentence translation pair comprising been input phrase held in a first step,
The first language example sentence of the example sentence parallel translation set held in the first step and the example sentence pattern in the first language of the example sentence pattern translation set searched in the third step, and the second language in the example sentence parallel translation set A fourth step of matching between an example sentence and an example sentence pattern of the second language in the example sentence pattern parallel translation set;
A fifth step of extracting a translation of the input phrase based on the matching result of the fourth step ;
When it is determined that they match in the second step, the bilingual example sentence is output as a translation of the input phrase, and when it is determined that they do not match in the second step, the translation of the input phrase extracted in the fifth step is output. A sixth step of outputting;
Example sentence matching translation program to make computer execute .

Images