ATE267445T1 - Verbessern der leistung von kodierungssystemen, die hochfrequenz-rekonstruktionsverfahren verwenden - Google Patents

Verbessern der leistung von kodierungssystemen, die hochfrequenz-rekonstruktionsverfahren verwenden

Info

Publication number
ATE267445T1
ATE267445T1 AT01983888T AT01983888T ATE267445T1 AT E267445 T1 ATE267445 T1 AT E267445T1 AT 01983888 T AT01983888 T AT 01983888T AT 01983888 T AT01983888 T AT 01983888T AT E267445 T1 ATE267445 T1 AT E267445T1
Authority
AT
Austria
Prior art keywords
frequency
audio signal
encoding
crossover frequency
core encoder
Prior art date
Application number
AT01983888T
Other languages
English (en)
Inventor
Fredrik Henn
Andreas Ehret
Michael Schug
Original Assignee
Coding Technologies Sweden Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coding Technologies Sweden Ab filed Critical Coding Technologies Sweden Ab
Application granted granted Critical
Publication of ATE267445T1 publication Critical patent/ATE267445T1/de

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Optical Communication System (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Transmitters (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
AT01983888T 2000-11-15 2001-11-14 Verbessern der leistung von kodierungssystemen, die hochfrequenz-rekonstruktionsverfahren verwenden ATE267445T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0004187A SE0004187D0 (sv) 2000-11-15 2000-11-15 Enhancing the performance of coding systems that use high frequency reconstruction methods
PCT/SE2001/002533 WO2002041302A1 (en) 2000-11-15 2001-11-14 Enhancing the performance of coding systems that use high frequency reconstruction methods

Publications (1)

Publication Number Publication Date
ATE267445T1 true ATE267445T1 (de) 2004-06-15

Family

ID=20281835

Family Applications (1)

Application Number Title Priority Date Filing Date
AT01983888T ATE267445T1 (de) 2000-11-15 2001-11-14 Verbessern der leistung von kodierungssystemen, die hochfrequenz-rekonstruktionsverfahren verwenden

Country Status (15)

Country Link
US (1) US7050972B2 (de)
EP (1) EP1334484B1 (de)
JP (6) JP3983668B2 (de)
KR (1) KR100551862B1 (de)
CN (1) CN1232950C (de)
AT (1) ATE267445T1 (de)
AU (1) AU2002215282A1 (de)
DE (1) DE60103424T2 (de)
DK (1) DK1334484T3 (de)
ES (1) ES2218462T3 (de)
HK (1) HK1058096A1 (de)
PT (1) PT1334484E (de)
SE (1) SE0004187D0 (de)
TR (1) TR200401631T4 (de)
WO (1) WO2002041302A1 (de)

Families Citing this family (73)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR433901A0 (en) 2001-04-10 2001-05-17 Lake Technology Limited High frequency signal construction method
US8605911B2 (en) 2001-07-10 2013-12-10 Dolby International Ab Efficient and scalable parametric stereo coding for low bitrate audio coding applications
SE0202159D0 (sv) 2001-07-10 2002-07-09 Coding Technologies Sweden Ab Efficientand scalable parametric stereo coding for low bitrate applications
AU2002352182A1 (en) * 2001-11-29 2003-06-10 Coding Technologies Ab Methods for improving high frequency reconstruction
US7240001B2 (en) 2001-12-14 2007-07-03 Microsoft Corporation Quality improvement techniques in an audio encoder
US6934677B2 (en) 2001-12-14 2005-08-23 Microsoft Corporation Quantization matrices based on critical band pattern information for digital audio wherein quantization bands differ from critical bands
US20030187663A1 (en) 2002-03-28 2003-10-02 Truman Michael Mead Broadband frequency translation for high frequency regeneration
KR100605824B1 (ko) 2002-05-13 2006-07-31 삼성전자주식회사 부호분할다중접속 이동통신시스템의 방송서비스 방법
US7447631B2 (en) 2002-06-17 2008-11-04 Dolby Laboratories Licensing Corporation Audio coding system using spectral hole filling
US7502743B2 (en) 2002-09-04 2009-03-10 Microsoft Corporation Multi-channel audio encoding and decoding with multi-channel transform selection
SE0202770D0 (sv) 2002-09-18 2002-09-18 Coding Technologies Sweden Ab Method for reduction of aliasing introduces by spectral envelope adjustment in real-valued filterbanks
US7318027B2 (en) 2003-02-06 2008-01-08 Dolby Laboratories Licensing Corporation Conversion of synthesized spectral components for encoding and low-complexity transcoding
FR2852172A1 (fr) * 2003-03-04 2004-09-10 France Telecom Procede et dispositif de reconstruction spectrale d'un signal audio
JP2004309921A (ja) * 2003-04-09 2004-11-04 Sony Corp 符号化装置、符号化方法及びプログラム
US7318035B2 (en) * 2003-05-08 2008-01-08 Dolby Laboratories Licensing Corporation Audio coding systems and methods using spectral component coupling and spectral component regeneration
DE10328777A1 (de) * 2003-06-25 2005-01-27 Coding Technologies Ab Vorrichtung und Verfahren zum Codieren eines Audiosignals und Vorrichtung und Verfahren zum Decodieren eines codierten Audiosignals
US20050004793A1 (en) * 2003-07-03 2005-01-06 Pasi Ojala Signal adaptation for higher band coding in a codec utilizing band split coding
US20050018796A1 (en) * 2003-07-07 2005-01-27 Sande Ravindra Kumar Method of combining an analysis filter bank following a synthesis filter bank and structure therefor
US7460990B2 (en) * 2004-01-23 2008-12-02 Microsoft Corporation Efficient coding of digital media spectral data using wide-sense perceptual similarity
DE102004009949B4 (de) * 2004-03-01 2006-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Ermitteln eines Schätzwertes
US8484036B2 (en) 2005-04-01 2013-07-09 Qualcomm Incorporated Systems, methods, and apparatus for wideband speech coding
PT1875463T (pt) 2005-04-22 2019-01-24 Qualcomm Inc Sistemas, métodos e aparelho para nivelamento de fator de ganho
CN101167126B (zh) * 2005-04-28 2011-09-21 松下电器产业株式会社 语音编码装置和语音编码方法
US7548853B2 (en) * 2005-06-17 2009-06-16 Shmunk Dmitry V Scalable compressed audio bit stream and codec using a hierarchical filterbank and multichannel joint coding
US7953604B2 (en) * 2006-01-20 2011-05-31 Microsoft Corporation Shape and scale parameters for extended-band frequency coding
US7831434B2 (en) * 2006-01-20 2010-11-09 Microsoft Corporation Complex-transform channel coding with extended-band frequency coding
US8190425B2 (en) * 2006-01-20 2012-05-29 Microsoft Corporation Complex cross-correlation parameters for multi-channel audio
US20080109215A1 (en) * 2006-06-26 2008-05-08 Chi-Min Liu High frequency reconstruction by linear extrapolation
WO2008031458A1 (en) * 2006-09-13 2008-03-20 Telefonaktiebolaget Lm Ericsson (Publ) Methods and arrangements for a speech/audio sender and receiver
JP4918841B2 (ja) * 2006-10-23 2012-04-18 富士通株式会社 符号化システム
US8295507B2 (en) * 2006-11-09 2012-10-23 Sony Corporation Frequency band extending apparatus, frequency band extending method, player apparatus, playing method, program and recording medium
KR101355376B1 (ko) 2007-04-30 2014-01-23 삼성전자주식회사 고주파수 영역 부호화 및 복호화 방법 및 장치
US7885819B2 (en) 2007-06-29 2011-02-08 Microsoft Corporation Bitstream syntax for multi-process audio decoding
PL2186086T3 (pl) * 2007-08-27 2013-07-31 Ericsson Telefon Ab L M Częstotliwość adaptacyjnego przejścia między wypełnianiem szumami a rozszerzaniem pasma
KR101235830B1 (ko) * 2007-12-06 2013-02-21 한국전자통신연구원 음성코덱의 품질향상장치 및 그 방법
ATE518224T1 (de) * 2008-01-04 2011-08-15 Dolby Int Ab Audiokodierer und -dekodierer
CN101281748B (zh) * 2008-05-14 2011-06-15 武汉大学 用编码索引实现的空缺子带填充方法及编码索引生成方法
KR101345695B1 (ko) 2008-07-11 2013-12-30 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 대역폭 확장 출력 데이터를 생성하기 위한 장치 및 방법
EP2304723B1 (de) * 2008-07-11 2012-10-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und verfahren zur dekodierung eines kodierten tonsignals
PL3246918T3 (pl) 2008-07-11 2023-11-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Dekoder audio, sposób dekodowania sygnału audio oraz program komputerowy
PT2301011T (pt) 2008-07-11 2018-10-26 Fraunhofer Ges Forschung Método e discriminador para classificar diferentes segmentos de um sinal de áudio compreendendo segmentos de discurso e de música
US8326640B2 (en) * 2008-08-26 2012-12-04 Broadcom Corporation Method and system for multi-band amplitude estimation and gain control in an audio CODEC
JP2010079275A (ja) * 2008-08-29 2010-04-08 Sony Corp 周波数帯域拡大装置及び方法、符号化装置及び方法、復号化装置及び方法、並びにプログラム
PL4224474T3 (pl) 2008-12-15 2024-04-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Dekoder powiększania szerokości pasma audio, powiązany sposób oraz program komputerowy
JP5446258B2 (ja) * 2008-12-26 2014-03-19 富士通株式会社 オーディオ符号化装置
JP5237465B2 (ja) 2009-01-16 2013-07-17 ドルビー インターナショナル アーベー クロス生成物により向上された高調波転換
JP4977157B2 (ja) * 2009-03-06 2012-07-18 株式会社エヌ・ティ・ティ・ドコモ 音信号符号化方法、音信号復号方法、符号化装置、復号装置、音信号処理システム、音信号符号化プログラム、及び、音信号復号プログラム
CN102388417B (zh) 2009-03-17 2015-10-21 杜比国际公司 基于自适应地可选择的左/右或中央/侧边立体声编码和参数立体声编码的组合的高级立体声编码
JP4932917B2 (ja) * 2009-04-03 2012-05-16 株式会社エヌ・ティ・ティ・ドコモ 音声復号装置、音声復号方法、及び音声復号プログラム
US11657788B2 (en) 2009-05-27 2023-05-23 Dolby International Ab Efficient combined harmonic transposition
TWI591625B (zh) 2009-05-27 2017-07-11 杜比國際公司 從訊號的低頻成份產生該訊號之高頻成份的系統與方法，及其機上盒、電腦程式產品、軟體程式及儲存媒體
JP5771618B2 (ja) 2009-10-19 2015-09-02 ドルビー・インターナショナル・アーベー 音声オブジェクトの区分を示すメタデータ時間標識情報
CN102947882B (zh) * 2010-04-16 2015-06-17 弗劳恩霍夫应用研究促进协会 使用制导带宽扩展和盲带宽扩展生成宽带信号的装置、方法
US12002476B2 (en) 2010-07-19 2024-06-04 Dolby International Ab Processing of audio signals during high frequency reconstruction
ES2798144T3 (es) 2010-07-19 2020-12-09 Dolby Int Ab Procesamiento de señales de audio durante la reconstrucción de alta frecuencia
EP2466580A1 (de) * 2010-12-14 2012-06-20 Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. Codierer und Verfahren zur prädiktiven Codierung, Decodierer und Verfahren zur Decodierung, System und Verfahren zur prädiktiven Codierung und Decodierung und prädiktiv codiertes Informationssignal
CN102208188B (zh) 2011-07-13 2013-04-17 华为技术有限公司 音频信号编解码方法和设备
US9437213B2 (en) * 2012-03-05 2016-09-06 Malaspina Labs (Barbados) Inc. Voice signal enhancement
CN104321815B (zh) 2012-03-21 2018-10-16 三星电子株式会社 用于带宽扩展的高频编码/高频解码方法和设备
EP2682941A1 (de) * 2012-07-02 2014-01-08 Technische Universität Ilmenau Vorrichtung, Verfahren und Computerprogramm für frei wählbare Frequenzverschiebungen in der Subband-Domäne
WO2014068817A1 (ja) * 2012-10-31 2014-05-08 パナソニック株式会社 オーディオ信号符号化装置及びオーディオ信号復号装置
PL2951814T3 (pl) 2013-01-29 2017-10-31 Fraunhofer Ges Forschung Emfaza małych częstotliwości kodowania opartego na LPC w dziedzinie częstotliwości
BR122017006701B1 (pt) 2013-04-05 2022-03-03 Dolby International Ab Codificador e decodificador de áudio estereofônico
TWI546799B (zh) 2013-04-05 2016-08-21 杜比國際公司 音頻編碼器及解碼器
WO2014161995A1 (en) 2013-04-05 2014-10-09 Dolby International Ab Audio encoder and decoder for interleaved waveform coding
JP6305694B2 (ja) 2013-05-31 2018-04-04 クラリオン株式会社 信号処理装置及び信号処理方法
RU2632585C2 (ru) * 2013-06-21 2017-10-06 Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. Способ и устройство для получения спектральных коэффициентов для заменяющего кадра аудиосигнала, декодер аудио, приемник аудио и система для передачи аудиосигналов
KR102329309B1 (ko) 2013-09-12 2021-11-19 돌비 인터네셔널 에이비 Qmf 기반 처리 데이터의 시간 정렬
CN104681029B (zh) * 2013-11-29 2018-06-05 华为技术有限公司 立体声相位参数的编码方法及装置
US20150194157A1 (en) * 2014-01-06 2015-07-09 Nvidia Corporation System, method, and computer program product for artifact reduction in high-frequency regeneration audio signals
KR102250472B1 (ko) * 2016-03-07 2021-05-12 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 하이브리드 은닉 방법: 오디오 코덱들에서 주파수 및 시간 도메인 패킷 손실 은닉의 결합
EP4091332A1 (de) * 2020-01-15 2022-11-23 Dolby International AB Adaptives streaming von medieninhalt mit bitratenumschaltung
BR112023001616A2 (pt) * 2020-07-30 2023-02-23 Fraunhofer Ges Forschung Aparelho, método e programa de computador para codificar um sinal de áudio ou para decodificar uma cena de áudio codificada

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158751A (en) * 1978-02-06 1979-06-19 Bode Harald E W Analog speech encoder and decoder
JPS595297A (ja) * 1982-07-01 1984-01-12 日本電気株式会社 帯域分割型ボコ−ダ
NL8700985A (nl) * 1987-04-27 1988-11-16 Philips Nv Systeem voor sub-band codering van een digitaal audiosignaal.
US5285498A (en) * 1992-03-02 1994-02-08 At&T Bell Laboratories Method and apparatus for coding audio signals based on perceptual model
JP3297750B2 (ja) * 1992-03-18 2002-07-02 ソニー株式会社 符号化方法
JP3218679B2 (ja) * 1992-04-15 2001-10-15 ソニー株式会社 高能率符号化方法
US5404377A (en) * 1994-04-08 1995-04-04 Moses; Donald W. Simultaneous transmission of data and audio signals by means of perceptual coding
JP3277692B2 (ja) * 1994-06-13 2002-04-22 ソニー株式会社 情報符号化方法、情報復号化方法及び情報記録媒体
JP3557674B2 (ja) * 1994-12-15 2004-08-25 ソニー株式会社 高能率符号化方法及び装置
US5646961A (en) * 1994-12-30 1997-07-08 Lucent Technologies Inc. Method for noise weighting filtering
JPH09172376A (ja) * 1995-12-20 1997-06-30 Hitachi Ltd 量子化ビット割当て装置
JP3255022B2 (ja) * 1996-07-01 2002-02-12 日本電気株式会社 適応変換符号化方式および適応変換復号方式
US6490562B1 (en) * 1997-04-09 2002-12-03 Matsushita Electric Industrial Co., Ltd. Method and system for analyzing voices
SE512719C2 (sv) * 1997-06-10 2000-05-02 Lars Gustaf Liljeryd En metod och anordning för reduktion av dataflöde baserad på harmonisk bandbreddsexpansion
US5928342A (en) * 1997-07-02 1999-07-27 Creative Technology Ltd. Audio effects processor integrated on a single chip with a multiport memory onto which multiple asynchronous digital sound samples can be concurrently loaded
DE19730130C2 (de) * 1997-07-14 2002-02-28 Fraunhofer Ges Forschung Verfahren zum Codieren eines Audiosignals
US6385548B2 (en) * 1997-12-12 2002-05-07 Motorola, Inc. Apparatus and method for detecting and characterizing signals in a communication system
US6757395B1 (en) * 2000-01-12 2004-06-29 Sonic Innovations, Inc. Noise reduction apparatus and method
US20020116197A1 (en) * 2000-10-02 2002-08-22 Gamze Erten Audio visual speech processing

Also Published As

Publication number Publication date
ES2218462T3 (es) 2004-11-16
JP2007293354A (ja) 2007-11-08
JP4991397B2 (ja) 2012-08-01
JP2014089472A (ja) 2014-05-15
CN1232950C (zh) 2005-12-21
JP2004514180A (ja) 2004-05-13
JP6368740B2 (ja) 2018-08-01
DK1334484T3 (da) 2004-08-09
US7050972B2 (en) 2006-05-23
JP6592148B2 (ja) 2019-10-16
SE0004187D0 (sv) 2000-11-15
KR20030076576A (ko) 2003-09-26
PT1334484E (pt) 2004-09-30
AU2002215282A1 (en) 2002-05-27
HK1058096A1 (en) 2004-04-30
JP2018185530A (ja) 2018-11-22
EP1334484B1 (de) 2004-05-19
JP2012093774A (ja) 2012-05-17
EP1334484A1 (de) 2003-08-13
CN1475010A (zh) 2004-02-11
DE60103424D1 (de) 2004-06-24
JP2016189015A (ja) 2016-11-04
DE60103424T2 (de) 2005-06-16
US20020103637A1 (en) 2002-08-01
TR200401631T4 (tr) 2004-09-21
JP3983668B2 (ja) 2007-09-26
WO2002041302A1 (en) 2002-05-23
JP6207404B2 (ja) 2017-10-04
JP5933965B2 (ja) 2016-06-15
KR100551862B1 (ko) 2006-02-13

Similar Documents

Publication Publication Date Title
ATE267445T1 (de) Verbessern der leistung von kodierungssystemen, die hochfrequenz-rekonstruktionsverfahren verwenden
JP7383067B2 (ja) 高度なスペクトラム拡張を使用して量子化ノイズを低減するための圧縮伸張装置および方法
DE60120734D1 (de) Vorrichtung zur erweiterung der bandbreite eines audiosignals
TWI536369B (zh) 用以基於線性預測編碼之於頻域中編碼的低頻率增強技術
DE60317203D1 (de) Audio-kodierung
JPH0856163A (ja) 適応的デジタルオーディオ符号化システム
WO2005034080A3 (en) A method of making a window type decision based on mdct data in audio encoding
US11694701B2 (en) Low-complexity tonality-adaptive audio signal quantization
US10186273B2 (en) Method and apparatus for encoding/decoding an audio signal
KR20030068716A (ko) 웨이브렛 패킷 변환을 이용한 오디오 압축 방법 및 그시스템
KR100378796B1 (ko) 디지탈 오디오 부호화기 및 복호화 방법
KR20060036724A (ko) 오디오 신호 부호화 및 복호화 방법 및 그 장치
EP2595147A1 (de) Kodierverfahren und -vorrichtung für audiodateien
MX2022006398A (es) Codificador, decodificador, metodo de codificacion y metodo de decodificacion para la prediccion a largo plazo en el dominio de la frecuencia de se?ales tonales para la codificacion de audio.
CN112995425B (zh) 一种等响度混音方法及装置
US10332527B2 (en) Method and apparatus for encoding and decoding audio signal
CN110534119B (zh) 一种基于人耳听觉频率尺度信号分解的音频编解码方法
JP3863706B2 (ja) 音声符号化方法
Rajani et al. Vocoder (LPC) Analysis by Variation of Input Parameters and Signals
SE9800338D0 (sv) Audio coding method and apparatus
TH135226A (th) โคเดกเสียงที่ใช้การสังเคราะห์สัญญาณรบกวนในระหว่างเฟสที่ไม่มีการใช้งาน

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification

Ref document number: 1334484

Country of ref document: EP

EEFA Change of the company name