• Title/Summary/Keyword: pitch sequence

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The reduction of Tire pattern noise by using pitch sequence (피치배열을 이용한 타이어 패턴노이즈 저감)

  • Hwang S.W.;Bang M.J.;Kim S.J.;Cho C.T.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.611-614
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    • 2005
  • It is well known that tire tread pattern has much influence on the tire pattern noise. The paper describes the method of pattern noise reduction by using the pitch sequence, both on the smooth asphalt roads and on the trenched concrete roads. The noise of tire is classified as either airborne or structure borne noise. Pattern noise through the airborne is considered as a major noise source at high speeds. As block impacting and air pumping by tread patterns are major noise source, tire pattern noise can be greatly influenced by optimal pitch sequence. The goal of this paper is to provide tire engineers with pitch sequence to reduce pattern noise effectively.

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Thai Classical Music Matching Using t-Distribution on Instantaneous Robust Algorithm for Pitch Tracking Framework

  • Boonmatham, Pheerasut;Pongpinigpinyo, Sunee;Soonklang, Tasanawan
    • Journal of Information Processing Systems
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    • v.13 no.5
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    • pp.1213-1228
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    • 2017
  • The pitch tracking of music has been researched for several decades. Several possible improvements are available for creating a good t-distribution, using the instantaneous robust algorithm for pitch tracking framework to perfectly detect pitch. This article shows how to detect the pitch of music utilizing an improved detection method which applies a statistical method; this approach uses a pitch track, or a sequence of frequency bin numbers. This sequence is used to create an index that offers useful features for comparing similar songs. The pitch frequency spectrum is extracted using a modified instantaneous robust algorithm for pitch tracking (IRAPT) as a base combined with the statistical method. The pitch detection algorithm was implemented, and the percentage of performance matching in Thai classical music was assessed in order to test the accuracy of the algorithm. We used the longest common subsequence to compare the similarities in pitch sequence alignments in the music. The experimental results of this research show that the accuracy of retrieval of Thai classical music using the t-distribution of instantaneous robust algorithm for pitch tracking (t-IRAPT) is 99.01%, and is in the top five ranking, with the shortest query sample being five seconds long.

The Reduction of Tire Pattern Noise Using Time-Frequency Transform (저소음 타이어 설계에 대한 시변주파수 분석 적용)

  • Hwang, S.W.;Bang, M.J.;Kim, S.J.;Cho, C.T.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.11b
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    • pp.144-147
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    • 2005
  • The tire is considered as one of the Important noise sources having an influence on vehicle's performance. The Pattern noise of a tire is the transmission sound of airborne noise. On smooth asphalt road, Pattern noise is amplified with the velocity. In recent, the study on the reduction of Pattern noise is energetically processed. Pattern noise is strongly related with pitch sequence. To reduce the pattern noise, tire's designer has to randomize the sequence of pitch. The FFT is a traditional method to evaluate the level of the randomization of the pitch sequence, but gives no information on time-varying, instantaneous frequency. In the study, we found that Time-Frequency transform is a useful method to non-stationary signal such as tire noise.

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The Reduction of Tire Pattern Noise Using Time-frequency Transform (시변주파수 분석을 이용한 저소음 타이어 설계)

  • Hwang, S.W.;Bang, M.M.;Rho, K.H.;Kim, S.J.
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.16 no.6 s.111
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    • pp.627-633
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    • 2006
  • The tire is considered as one of the important noise sources having an influence on vehicle's performance. The Pattern noise of a tire is the transmission sound of airborne noise. On smooth asphalt road, Pattern noise is amplified with the velocity. In recent, the study on the reduction of Pattern noise is energetically processed. Pattern noise is strongly related with pitch sequence. To reduce the pattern noise, tire's designer has to randomize the sequence of pitch. The FFT is a traditional method to evaluate the level of the randomization of the pitch sequence, but gives no information on time-varying, instantaneous frequency. In the study, we found that Time-Frequency transform is a useful method to non-stationary signal such as tire noise.

A study on the Pitch Array for reducing Noise (소음 저감을위한 피치 배열에 관한 연구)

  • Choo, K.C.;Choi, S.I.;Lee, H.J.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2009.10a
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    • pp.575-577
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    • 2009
  • Traditionally, tire made a role of function, which is supporting vehicle load, making brake, transferring, traction etc. So, there are a lot of studying for the tire. especially, tire noise is one of the most important parameter in the car noise. this thesis shows the method how to reduce the tire noise by using the optimal pitch sequence. Because the optimal pitch sequence prevents tire from generating the pure tone while driving the car on the ground.

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Korean Intonation Patterns from the Viewpoint of F0 Percentage Change (F0 변화율로 본 한국어 억양 패턴의 음향 특성)

  • Lee, Ji Yeon;Lee, Ho-Young
    • Phonetics and Speech Sciences
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    • v.5 no.1
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    • pp.123-130
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    • 2013
  • Previous researches on Korean intonation have been mainly focused on $F_0$ target frequencies, $F_0$ slope, and the duration of intonation patterns. This study investigated Korean intonation patterns, both boundary and phrasal tones, in relation to the $F_0$ percentage change between pitch targets. We measured the percentage change between the pitch targets of both boundary and phrasal tones. Additionally, the $F_0$ change between the preceding pitch target and the first pitch target of the boundary tone and the $F_0$ targets of the sequence of two LH phrasal tones ('LH + LH') were also measured. Two phrasal tones, LHLH and HLH, were compared with 'LH + LH' and the 'HLH' in the LHLH pattern respectively. We found that the percentage change between pitch targets in the phrasal tone is fixed to some extent. This helped explain why the slope of the phrasal tone is closely related to the number of syllables and the duration of the phrasal tone as discussed in previous studies. Since we analyzed the intonation patterns with the utterances from a large speech corpus, the results of this paper are expected to be used in building a larger annotated corpus of Korean.

Interval-Based Singing Program for Improving the Accuracy of Pitch Production in Children With Cochlear Implants: A Case Study (음정 모방 중심 노래부르기를 통한 인공와우이식아동의 음고 산출 정확도 향상 사례)

  • Kim, Hyo Jin;Chong, Hyun Ju
    • Journal of Music and Human Behavior
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    • v.14 no.1
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    • pp.1-16
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    • 2017
  • The purpose of this study was to examine changes in the accuracy and range of produced pitch in children with cochlear implants (CI) after an interval-based singing program. A total of three children with CIs aged 5 received twelve 35-minute individual sessions two to three times per week. The interval-based singing program was composed with third, fifth, and eighth intervals and implemented pitch discrimination, pitch imitation, and singing songs with target intervals in a sequence. At pretest and posttest, the changes in accuracy of pitch production during pitch imitation and singing were measured. The results demonstrated that all participants showed improvement in pitch accuracy and produced the target notes with great similarity to the expected pitches in the original song. The range of produced pitch also increased after the program. The results indicate that sequential trials to imitate pitches in a multisensory environment to facilitate the processing of pitch information may reflect how this population perceives pitch information and assist children with CIs to improve their pitch accuracy.

Music Identification Using Pitch Histogram and MFCC-VQ Dynamic Pattern (피치 히스토그램과 MFCC-VQ 동적 패턴을 사용한 음악 검색)

  • Park Chuleui;Park Mansoo;Kim Sungtak;Kim Hoirin
    • The Journal of the Acoustical Society of Korea
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    • v.24 no.3
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    • pp.178-185
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    • 2005
  • This paper presents a new music identification method using probabilistic and dynamic characteristics of melody. The propo3ed method uses pitch and MFCC parameters as feature vectors for the characteristics of music notes and represents melody pattern by pitch histogram and temporal sequence of codeword indices. We also propose a new pattern matching method for the hybrid method. We have tested the proposed algorithm in small (drama OST) and broad (1.005 popular songs) search spaces. The experimental results on search areas of OST and 1,005 popular songs showed better performance of the proposed method over conventional methods. We achieved the performance improvement of average $9.9\%$ and $10.2\%$ in error reduction rate on each search area.

A Design of Matching Engine for a Practical Query-by-Singing/Humming System with Polyphonic Recordings

  • Lee, Seok-Pil;Yoo, Hoon;Jang, Dalwon
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.8 no.2
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    • pp.723-736
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    • 2014
  • This paper proposes a matching engine for a query-by-singing/humming (QbSH) system with polyphonic music files like MP3 files. The pitch sequences extracted from polyphonic recordings may be distorted. So we use chroma-scale representation, pre-processing, compensation, and asymmetric dynamic time warping to reduce the influence of the distortions. From the experiment with 28 hour music DB, the performance of our QbSH system based on polyphonic database is very promising in comparison with the published QbSH system based on monophonic database. It shows 0.725 in MRR(Mean Reciprocal Rank). Our matching engine can be used for the QbSH system based on MIDI DB also and that performance was verified by MIREX 2011.

A Study on the Design of Format Converter for Pixel-Parallel Image Processing (픽셀-병렬 영상처리에 있어서 포맷 컨버터 설계에 관한 연구)

  • 김현기;김현호;하기종;최영규;류기환;이천희
    • Proceedings of the IEEK Conference
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    • 2001.06b
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    • pp.269-272
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    • 2001
  • In this paper we proposed the format converter design and implementation for real time image processing. This design method is based on realized the large processor-per-pixel array by integrated circuit technology in which this two types of integrated structure is can be classify associative parallel processor and parallel process with DRAM cell. Layout pitch of one-bit-wide logic is identical memory cell pitch to array high density PEs in integrate structure. This format converter design has control path implementation efficiently, and can be utilized the high technology without complicated controller hardware. Sequence of array instruction are generated by host computer before process start, and instructions are saved on unit controller. Host computer is executed the pixel-parallel operation starting at saved instructions after processing start

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