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SNOBOL-Tone (ST) - a Sound Pattern-Matching Programming Language

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SNOBOL-Tone (ST) - a Sound Pattern-Matching Programming Language SNOBOL-Tone (ST) - A Sound Pattern-Matching Programming Language Dan Ophir(1) and Dotan Dekel(2) AFEKA, Tel-Aviv Academic College of Engineering, Tel Aviv, Israel (1) [email protected] (2) [email protected] Abstract Keywords: Interpreter, Fast Fourier Transform, Pattern- The proposed programming language, matching, MLAT – Multi Level Adaptive SNOBOL-Tone, performs sound matching in a Technique. given sound stream. This is analogous to pattern-matching of substrings in a given 1. Introduction string, as is done in the SNOBOL language [1]. SNOBOL-Tone is a Domain Specific One way to perform the SNOBOL-Tone pattern Language (DSL) for the specific purpose of matching of a spoken text is to transcribe the treating tones, sounds and signals [5]. Another text into written text followed by regular language that has a similar function is CSound SNOBOL pattern matching [2]. However, [6]. Csound is a computer programming when the sound stream is not a spoken stream language for sound, also known as a sound another solution is needed. SNOBOL-Tone is compiler or an audio programming language, designed to provide such a solution. or more precisely, an audio DSL. It is called SNOBOL-Tone integrates three scientific Csound because it is written in C, as opposed domains: to some of its predecessors. 1. Computer science – creating 2. SNOBOL Concepts compilers and interpreters; 2. Electronic engineering – building SNOBOL [1] is a string pattern matching filters of various frequencies; programming language based on a single 3. Applied mathematics – Fourier statement: transformations, wavelets, optimization of algebraic expressions (1) <label>: <subject> <pattern> = and multi-level-adaptive-techniques <object> :S(label1)F(label2) to accelerate various filtering algorithms [3]. In which the subject is searched for a substring fulfilling the constraints defined by the pattern, Examples of SNOBOL-Tone Applications: and then this subject is substituted by the object. In case of a successful pattern 1. A tool for developing smartphone matching the next executed statement is applications; located in the label lebel1, otherwise label2. 2. A diagnostic tool for measuring heart functions; 3. SNOBOL-Tone Language 3. Aircrafts recognition by their engine noise; SNOBOL-Tone is a tone pattern matching 4. Stammering purification – removal of programming language, an extension of the the stammering to produce normal SNOBOL string pattern language. Fig.1 is a speech. simple program that demonstrates SNOBOL- Tone. The statement definitions of the extended languages look very similar to SNOBOL, but the significance of the variables is different. Whereas in regular SNOBOL, the This stream of a one variable function can be variables generally represent a string, namely a matched with the help of auxiliary functions stream of characters, in the SNOBOL-Tone treating other function properties, such as frequency, extreme values etc. The input and they stand for a stream of values, i.e. function output streams may be described visually as a values such as sound. graph thus increasing the program’s readability. Fig. 1: SNOBOL-Tone sample program 4. SNOBOL-Tone (ST) System 5. Theoretical Background The SNOBOL-Tone (ST) System consists of The mathematical tools for ST are mainly modules serving various programming based on digitalized fast Fourier languages: SNOBOL-Tone (ST) and the host transformations which transforms a function to language, MATLAB (see the block diagram in the frequency domain, and on wavelet series Fig. 2). which approximates the analyzed signal. In Blocks 4 and 5 in Fig.2 are relevant to the tone order to increase the algorithm’s efficiency, a treatment. Block 3 treats the ST built in multi-level adaptive technique (MLAT) functions such as Peak_Amplitude, which methodology can be used [4]. searches for the maximal amplitude; Frequency (lower_limit, upper_limit) which 6. Discussion gives the frequencies function between two SNOBOL was chosen as the basic language; limits and Peaks_Number (interval) which however, there were other possibilities such as gives the number of peaks in the interval. the Perl [5] and Python [6] programming Block 4 represents a module that performs languages because of their concise and elegant DFFT - Digitalized Fast Fourier Transform on definitions. There are also some audio a given interval for further usage. manipulation packages available on the market such as Csound and audio DSL [7] and [8]), but their flexibility is rather limited. Fig. 2: Relevant module interactions in the performance of SNOBOL-Tone (ST). 7. Conclusions [3] Lawrence Rabiner, Biing-Hwang Juang, Fundamentals of Speech Recognition, The SNOBOL-Tone programming language 1993. has a wide spectrum of applications in audio [4] Achi Brandt, Multiscale scientific processing and in signal processing. It can be computation: review. In Timothy J. Barth, easily utilized in applications such as Tony Chan, Robert Haimes. Multiscale seismographs, heart monitors, and polygraph and multiresolution methods: theory and analysis. applications. Springer. p. 53, 2002 [5] Randal L. Schwartz, Tom Phoenix, SNOBOL-Tone analogically develops the Learning Perl, O’ Reilly, 2013. string-matching and tree-matching [2], using [6] John Zelle, Python Programming: An tone-matching or generally speaking the Introduction to Computer Science; Kindle signal-matching; its theoretical infrastructure Edition, 2010. is given in [9] and [10]. [7] http://en.wikipedia.org/wiki/Domain- specific_language 8. References [8] http://en.wikipedia.org/wiki/Csound [9] Lawrence Rabiner and Ronald Schafer, [1] Ralph E. Griswold and etc.; Snobol 4 Theory and Applications of Digital Speech Programming Language, (Automatic Processing; Kindle Edition, 2010. Computation) 1971. [10] Bernard Gold, Nelson Morgan, Dan Ellis; [2] Dan Ophir, SNOBOL+ a language for Speech and Audio Signal Processing: tree-pattern-matching; M.Sc. Thesis, Processing and Perception of Speech and Weizmann Institute of Science, 1972. Music,John Wiley, 2013. .
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