JP6103718B2 - 効率的な2段構成の非同期式サンプルレートコンバータ - Google Patents
効率的な2段構成の非同期式サンプルレートコンバータ Download PDFInfo
- Publication number
- JP6103718B2 JP6103718B2 JP2014201030A JP2014201030A JP6103718B2 JP 6103718 B2 JP6103718 B2 JP 6103718B2 JP 2014201030 A JP2014201030 A JP 2014201030A JP 2014201030 A JP2014201030 A JP 2014201030A JP 6103718 B2 JP6103718 B2 JP 6103718B2
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- JP
- Japan
- Prior art keywords
- sample rate
- sample
- samples
- input
- output
- 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.)
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F5/00—Methods or arrangements for data conversion without changing the order or content of the data handled
- G06F5/06—Methods or arrangements for data conversion without changing the order or content of the data handled for changing the speed of data flow, i.e. speed regularising or timing, e.g. delay lines, FIFO buffers; over- or underrun control therefor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
- H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
- H03H17/0628—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing the input and output signals being derived from two separate clocks, i.e. asynchronous sample rate conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/05—Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
- H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
- H03H17/0635—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies
- H03H17/0685—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies the ratio being rational
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
- H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
- H04L7/0337—Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals
Description
M≒(N×fint/fdest)
fint=fdest×M/N
302 ASRC
304 同期式サンプルレートコンバータ(SSRC)
310 データのストリーム
315 単純なASRCサンプルバッファ
320 サンプルレート値
327、328 インジケータ
330 SSRC入力サンプルバッファ
335 コントローラ/計算器
337 SSRC出力サンプルバッファ
400 非同期式サンプルレートコンバータ
402 SSRC
404 ASRC
415 単純なASRCサンプルバッファ
425 コントローラ
427、447 インジケータ
435 SSRC入力サンプルバッファ
437 データのストリーム
445 コントローラ/計算器
449 サンプルレート値
455 SSRC出力サンプルバッファ
Claims (12)
- サンプルレートコンバータシステムであって、
入力部及び出力部を有する単純な非同期式サンプルレートコンバータと、
入力部及び出力部を有する同期式サンプルレートコンバータと、を備え、
前記単純な非同期式サンプルレートコンバータの前記出力部は、前記同期式サンプルレートコンバータの前記入力部に接続される、
ことを特徴とする、システム。 - 前記単純な非同期式サンプルレートコンバータは、入力サンプルレート及び出力サンプルレートを有し、前記出力サンプルレートに対する前記入力サンプルレートの比が、1に等しくは無いが、1にほぼ等しい、請求項1記載のシステム。
- 前記単純な非同期式サンプルレートコンバータは、サンプルバッファ及びコントローラを備える、請求項1記載のシステム。
- 前記同期式サンプルレートコンバータは、サンプルバッファ及びコントローラ/計算器を備える、請求項1記載のシステム。
- 前記単純な非同期式サンプルレートコンバータは、パケットバッファ及びコントローラを備える、請求項1記載のシステム。
- 前記同期式サンプルレートコンバータは、パケットバッファ及びコントローラ/計算器を備える、請求項1記載のシステム。
- 送出元からの入力サンプルレートのサンプルを出力サンプルレートに変換する方法であって、
複数の入力サンプルを前記送出元から受信するステップと、
前記入力サンプルレートの前記複数の入力サンプルを、中間サンプルレートの複数の中間サンプルに変換するステップと、を含み、
前記複数の入力サンプルは、新しいサンプルを挿入し又は前記複数の入力サンプルのうちの1つを削除することによって、前記複数の中間サンプルに変換され、
前記中間サンプルレートに対する前記入力サンプルレートの比は、1に等しくは無いが、1にほぼ等しく、
前記中間サンプルレートの前記複数の中間サンプルを前記出力サンプルレートの複数の出力サンプルに変換するステップを更に含み、
前記中間サンプルレート及び前記出力サンプルレートが一緒にロックされる、ことを特徴とする、方法。 - 前記挿入され又は削除されたサンプルにきわめて近接している前記サンプルを平滑化するステップを更に含む、請求項7記載の方法。
- 前記新しいサンプルは、前記新しいサンプルに直接隣接する前記入力サンプルのうちの1つと同じ値を有する、請求項7記載の方法。
- 新しいサンプルを挿入する前記ステップは、標準曲線適合法を用いて新しいサンプルを作成することを含む、請求項7記載の方法。
- 前記複数の中間サンプルは、内挿法を用いて前記複数の出力サンプルに変換される、請求項7記載の方法。
- 前記サンプルは、パケットで送信される、請求項7記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/043,509 US9258011B2 (en) | 2013-10-01 | 2013-10-01 | Efficient two-stage asynchronous sample-rate converter |
US14/043,509 | 2013-10-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2015072473A JP2015072473A (ja) | 2015-04-16 |
JP6103718B2 true JP6103718B2 (ja) | 2017-03-29 |
Family
ID=52673307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014201030A Expired - Fee Related JP6103718B2 (ja) | 2013-10-01 | 2014-09-30 | 効率的な2段構成の非同期式サンプルレートコンバータ |
Country Status (3)
Country | Link |
---|---|
US (1) | US9258011B2 (ja) |
JP (1) | JP6103718B2 (ja) |
DE (1) | DE102014113955A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10720904B2 (en) | 2018-11-12 | 2020-07-21 | Analog Devices International Unlimited Company | Techniques for input formatting and coefficient selection for sample rate converter in parallel implementation scheme |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050088456A (ko) | 2002-12-20 | 2005-09-06 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 비동기식 누화 소거 |
US7345600B1 (en) * | 2005-03-09 | 2008-03-18 | Texas Instruments Incorporated | Asynchronous sampling rate converter |
FR2903790A1 (fr) * | 2006-07-13 | 2008-01-18 | Dolphin Integration Sa | Adaptateur de flux de donnees |
WO2008022226A2 (en) | 2006-08-15 | 2008-02-21 | Ess Technology, Inc. | Asynchronous sample rate converter |
US7478011B2 (en) | 2006-12-19 | 2009-01-13 | International Business Machines Corporation | Method and system for measuring signal characteristics of data signals transmitted between integrated circuit chips |
US8849883B2 (en) | 2011-03-23 | 2014-09-30 | Analog Devices, Inc. | Method and apparatus for adaptive control of the decimation ratio in asynchronous sample rate converters |
-
2013
- 2013-10-01 US US14/043,509 patent/US9258011B2/en not_active Expired - Fee Related
-
2014
- 2014-09-26 DE DE201410113955 patent/DE102014113955A1/de not_active Withdrawn
- 2014-09-30 JP JP2014201030A patent/JP6103718B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2015072473A (ja) | 2015-04-16 |
US20150091743A1 (en) | 2015-04-02 |
DE102014113955A1 (de) | 2015-04-02 |
US9258011B2 (en) | 2016-02-09 |
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