JP2001513293A - 適応デュアルフィルタによるエコーキャンセレーション - Google Patents
適応デュアルフィルタによるエコーキャンセレーションInfo
- Publication number
- JP2001513293A JP2001513293A JP53758298A JP53758298A JP2001513293A JP 2001513293 A JP2001513293 A JP 2001513293A JP 53758298 A JP53758298 A JP 53758298A JP 53758298 A JP53758298 A JP 53758298A JP 2001513293 A JP2001513293 A JP 2001513293A
- Authority
- JP
- Japan
- Prior art keywords
- temporary storage
- filter coefficient
- value
- storing
- multipliers
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/76—Architectures of general purpose stored program computers
- G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
- G06F15/7807—System on chip, i.e. computer system on a single chip; System in package, i.e. computer system on one or more chips in a single package
- G06F15/7817—Specially adapted for signal processing, e.g. Harvard architectures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
- G06F7/5443—Sum of products
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Algebra (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 適応フィルタのエコーキャンセレーション情報の処理に用いる装置におい て、 複数の入力信号サンプルを記憶するためのサンプルメモリと、 複数の乗算器であって、該複数の乗算器のそれぞれの少なくとも1つの入力が 前記サンプルメモリの出力に結合している前記複数の乗算器と、 複数の加算器であって、前記複数の乗算器のそれぞれの出力が前記複数の加算 器の少なくとも1つに結合している前記複数の加算器と、 複数の一時記憶装置であって、該複数の一時記憶装置のそれぞれの入力および 出力が、前記複数の乗算器および前記複数の加算器の少なくとも1つに選択的に 結合せしめられる前記複数の一時記憶装置と、 を含む、前記装置。 2. 複数のデータメモリ装置であって、該複数のデータメモリ装置のそれぞれ が前記複数の乗算器の少なくとも1つの入力に結合している、前記複数のデータ メモリ装置をさらに含む、請求項1に記載の装置。 3. 前記複数のデータメモリ装置のそれぞれが、前記複数の一時記憶装置の少 なくとも1つに結合している、請求項2に記載の装置。 4. 前記装置がディジタル信号プロセッサを含む、請求項1に記載の装置。 5. 前記ディジタル信号プロセッサのコア内に配置された複数のデータメモリ 装置をさらに含む、請求項4に記載の装置。 6. 前記ディジタル信号プロセッサのコアの外部に配置された複数のデータメ モリ装置をさらに含む、請求項4に記載の装置。 7. 前記一時記憶装置のそれぞれがアキュムレータを含む、請求項1に記載の 装置。 8. 論理演算装置をさらに含み、該論理演算装置の入力および出力が、前記複 数の一時記憶装置の少なくとも1つに、前記複数の乗算器の少なくとも1つに、 および前記複数の加算器の少なくとも1つに結合している、請求項1に記載の装 置。 9. バレルシフタをさらに含む、請求項8に記載の装置。 10.前記複数の乗算器が2つの乗算器を含む、請求項1に記載の装置。 11.前記複数の加算器が2つの加算器を含む、請求項10に記載の装置。 12.前記複数の一時記憶装置が4つのアキュムレータを含む、請求項12に記 載の装置。 13.前記複数の入力信号サンプル値がN個の入力信号サンプル値を含む、請求 項1に記載の装置。 14.適応多重フィルタエコーキャンセレーション信号プロセッサにおけるフィ ルタ係数の更新方法において、 複数の入力信号サンプル値をサンプルメモリ位置に記憶するステップと、 第2記憶位置に定数乗数値を記憶するステップと、 第1データメモリ位置から第1フィルタ係数値を検索するステップと、 前記第1フィルタ係数値を第1一時記憶位置に記憶するステップと、 第2データメモリ位置から第2フィルタ係数値を検索するステップと、 前記第2フィルタ係数値を第2一時記憶位置に記憶するステップと、 前記複数の入力信号サンプル値の第1入力信号サンプル値に前記定数乗数値を 乗算するステップと、 前記乗算ステップの積を前記第1フィルタ係数値に加算し、かつ該加算ステッ プの結果を前記第1一時記憶位置に記憶するステップと、 を含む、前記方法。 15.第3フィルタ係数値を第3データメモリ位置から検索するステップと、 前記第3フィルタ係数値を第3一時記憶位置に記憶し、前記複数の入力信号サ ンプル値の第2入力信号サンプル値に前記定数乗数値を乗算するステップと、 前記乗算の積を前記第2フィルタ係数値に加算し、該加算の結果を前記第2一 時記憶位置に記憶するステップと、 をさらに含む、請求項14に記載の方法。 16.第4フィルタ係数値を第4データメモリ位置から検索するステップと、 前記第4フィルタ係数値を第4一時記憶位置に記憶し、前記複数の入力信号サ ンプル値の第3入力信号サンプル値に前記定数乗数値を乗算するステップと、 前記乗算の積を前記第3フィルタ係数値に加算し、該加算の結果を前記第3一 時記憶位置に記憶するステップと、 前記第1一時記憶位置からの前記結果を前記第1データメモリ位置に記憶する ステップと、 をさらに含む、請求項15に記載の方法。 17.前記第1一時記憶位置、第2一時記憶位置、第3一時記憶位置、および第 4一時記憶位置のそれぞれが、アキュムレータを含む、請求項16に記載の方法 。 18.前記諸ステップがディジタル信号プロセッサにおいて行われる、請求項1 に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/810,601 US5933797A (en) | 1997-02-28 | 1997-02-28 | Adaptive dual filter echo cancellation |
US08/810,601 | 1997-02-28 | ||
PCT/SE1998/000349 WO1998038582A1 (en) | 1997-02-28 | 1998-02-26 | Adaptive dual filter echo cancellation |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001513293A true JP2001513293A (ja) | 2001-08-28 |
JP4445041B2 JP4445041B2 (ja) | 2010-04-07 |
Family
ID=25204205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53758298A Expired - Lifetime JP4445041B2 (ja) | 1997-02-28 | 1998-02-26 | 適応デュアルフィルタによるエコーキャンセレーション |
Country Status (8)
Country | Link |
---|---|
US (1) | US5933797A (ja) |
JP (1) | JP4445041B2 (ja) |
CN (1) | CN1126049C (ja) |
AU (1) | AU6642498A (ja) |
DE (1) | DE19882141B4 (ja) |
GB (1) | GB2341067B (ja) |
MY (1) | MY122103A (ja) |
WO (1) | WO1998038582A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009514331A (ja) * | 2005-10-31 | 2009-04-02 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | デジタルフィルタ遅延の低減 |
Families Citing this family (18)
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FR2758677B1 (fr) * | 1997-01-21 | 1999-04-02 | Matra Communication | Procede d'annulation d'echo et annuleur d'echo mettant en oeuvre un tel procede |
US6279020B1 (en) * | 1997-12-23 | 2001-08-21 | U.S. Philips Corporation | Programmable circuit for realizing a digital filter |
EP0992885B1 (en) * | 1998-10-06 | 2005-12-28 | Texas Instruments Incorporated | Multiplier accumulator circuits |
US6571268B1 (en) | 1998-10-06 | 2003-05-27 | Texas Instruments Incorporated | Multiplier accumulator circuits |
US6687373B1 (en) | 1999-08-24 | 2004-02-03 | Nortel Networks Limited | Heusristics for optimum beta factor and filter order determination in echo canceler systems |
US6557022B1 (en) * | 2000-02-26 | 2003-04-29 | Qualcomm, Incorporated | Digital signal processor with coupled multiply-accumulate units |
US6725360B1 (en) * | 2000-03-31 | 2004-04-20 | Intel Corporation | Selectively processing different size data in multiplier and ALU paths in parallel |
US6714956B1 (en) * | 2000-07-24 | 2004-03-30 | Via Technologies, Inc. | Hardware accelerator for normal least-mean-square algorithm-based coefficient adaptation |
US7068780B1 (en) * | 2000-08-30 | 2006-06-27 | Conexant, Inc. | Hybrid echo canceller |
US7346012B2 (en) * | 2002-12-13 | 2008-03-18 | Tioga Technologies Ltd. | Transceiver with accelerated echo canceller convergence |
US20040193668A1 (en) * | 2003-03-31 | 2004-09-30 | Patrick Devaney | Virtual double width accumulators for vector processing |
US7716712B2 (en) * | 2003-06-18 | 2010-05-11 | General Instrument Corporation | Narrowband interference and identification and digital processing for cable television return path performance enhancement |
US20060224652A1 (en) * | 2005-04-05 | 2006-10-05 | Nokia Corporation | Instruction set processor enhancement for computing a fast fourier transform |
GB2439988A (en) * | 2005-06-01 | 2008-01-16 | Tecteon Plc | Subband coefficient adaptor for adaptive filter |
US9185233B2 (en) * | 2010-05-25 | 2015-11-10 | Intel Deutschland Gmbh | Audio communication device and method using fixed echo cancellation filter coefficients |
DE102012220488A1 (de) * | 2012-11-09 | 2014-05-15 | Robert Bosch Gmbh | Teilnehmerstation für ein Bussystem und Verfahren zur Verbesserung der Empfangsqualität von Nachrichten bei einer Teilnehmerstation eines Bussystems |
CN113194378B (zh) * | 2021-06-30 | 2021-11-26 | 深圳市汇顶科技股份有限公司 | 音频信号的降噪方法、音频信号处理装置及电子设备 |
WO2023272631A1 (zh) | 2021-06-30 | 2023-01-05 | 深圳市汇顶科技股份有限公司 | 音频信号的降噪方法、音频信号处理装置及电子设备 |
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-
1997
- 1997-02-28 US US08/810,601 patent/US5933797A/en not_active Expired - Lifetime
-
1998
- 1998-02-19 MY MYPI98000717A patent/MY122103A/en unknown
- 1998-02-26 WO PCT/SE1998/000349 patent/WO1998038582A1/en active Application Filing
- 1998-02-26 DE DE19882141T patent/DE19882141B4/de not_active Expired - Fee Related
- 1998-02-26 CN CN98802943A patent/CN1126049C/zh not_active Expired - Lifetime
- 1998-02-26 AU AU66424/98A patent/AU6642498A/en not_active Abandoned
- 1998-02-26 JP JP53758298A patent/JP4445041B2/ja not_active Expired - Lifetime
- 1998-02-26 GB GB9920266A patent/GB2341067B/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009514331A (ja) * | 2005-10-31 | 2009-04-02 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | デジタルフィルタ遅延の低減 |
Also Published As
Publication number | Publication date |
---|---|
DE19882141B4 (de) | 2009-01-02 |
CN1126049C (zh) | 2003-10-29 |
US5933797A (en) | 1999-08-03 |
DE19882141T1 (de) | 2000-01-13 |
WO1998038582A1 (en) | 1998-09-03 |
MY122103A (en) | 2006-03-31 |
GB2341067A (en) | 2000-03-01 |
CN1249829A (zh) | 2000-04-05 |
GB9920266D0 (en) | 1999-10-27 |
JP4445041B2 (ja) | 2010-04-07 |
AU6642498A (en) | 1998-09-18 |
GB2341067B (en) | 2001-11-07 |
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