JP2012503361A - EVRC(enhancedvariable−ratecodec)を介する帯域内シグナリング方法 - Google Patents
EVRC(enhancedvariable−ratecodec)を介する帯域内シグナリング方法 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
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- 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
- G10L19/04—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
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- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
- H04L25/0384—Design of pulse shapes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/066—Telephone sets adapted for data transmision
Abstract
Description
本願は、2008年9月5日に出願された、“Signal Design for Low-Bit Rate EVRC-B”なるタイトルの米国仮特許出願第61/097,177号及び2008年10月1日に出願された、”Tapered Narrow-band Data Signaling Method, System and Software for Enhanced Variable-rate Codec Compatibility in-Band Signaling”なるタイトルの米国仮特許出願第61/101,880号の優先権を主張するものである。これらの優先権出願は参照することによりそれらの全内容が本明細書に組み込まれるものとする。
いくつかの実施形態において、本発明は、以下に示すように、ディジタルコンピュータシステムで実現することができる。「ディジタルコンピュータシステム」なる用語は少なくとも一つのディジタルプロセッサ及び関連メモリを含む任意のシステムを意味し、該システムにおいてディジタルプロセッサはメモリに格納された命令又は「コード」を実行する。(メモリはデータも格納することができる)。ディジタルプロセッサは、限定はされないが、マイクロプロセッサ、マルチコアプロセッサ、DSP(ディジタル信号プロセッサ)、ボコーダ、プロセッサアレイ、ネットワークプロセッサなどを含む。ディジタルプロセッサはラップトップ又はデスクトップコンピュータ、PDA、セルフォン、アイフォンPDA、ブラックベリー(登録商標)PDA/フォンなどの大型装置又は実際上任意の電子デバイスの一部分とすることができる。
上で説明したように、本発明はコンピュータソフトウェアで実現又は具体化するのが好ましい(コンピュータソフトウェアは「コンピュータプログラム」又は「コード」としても知られ、これらの用語が交換可能に使用されている)。プログラム又はコードは、ディジタルプロセッサにより読み取ることができるディジタルメモリに格納されるとき最も有用である。場合によっては、ディジタルコンピュータシステムは、例えばシンプルテキストドキュメント又は「フラットファイル」を、ファイルを移動する、コピーする、削除する、Eメールする、ウィルスに対して走査するなどの意味でのみ読み取り可能とし得る。換言すれば、このファイルはこの特定のコンピュータシステムで実行可能とすることはできない(けれども、異なるプロセッサ又はコンピュータシステム又はプラットフォームで実行可能とすることができる)。「コンピュータ読み取り可能な記憶媒体」(又はその代わりの「機械読み取り可能な記憶媒体」)なる用語は、上述した種々のタイプのメモリの全てのみならず、将来生まれるかもしれない新技術も、それらがコンピュータプログラム又は他のデータの範疇のディジタル情報を適切なディジタルプロセッサで「読み取ることができるように格納するできる限り、意味するものとして使用する。「コンピュータ読み取り可能」なる用語は、関連するフレーズを完全なメインフレーム、ミニコンピュータ、デスクトップ又はラップトップコンピュータを意味する「コンピュータ」の歴史的用法に限定することを意図しない。むしろ、この用語は、その記憶媒体がディジタルプロセッサ又は任意のディジタルコンピュータシステムにより読み取り可能であることを意味するために用いる。このような媒体は、コンピュータ又はプロセッサにより局所的に及び/又は遠隔的にアクセスし得る任意の利用可能な媒体とすることができ、揮発性及び不揮発性の両媒体、リムーバブル及び非リムーバブルの両媒体を含む。
プログラムをコンピュータ読み取り可能な記憶媒体に格納した場合、この記憶媒体はコンピュータプログラム製品ということができる。例えば、携帯ディジタル記憶媒体はコンピュータプログラムを格納し移植(配送、購入、販売、許諾)するための便利な手段として使用できる。これは、昔はパッケージ化(「シュリンクラップ」)されたプログラムの店頭販売のために頻繁に行われていた。このような記憶媒体の例は、限定はされないが、CD−ROMなどがある。コンピュータプログラムが格納されたこのようなCD−ROMはコンピュータプログラム製品の一例である。
Claims (20)
- ディジタル無線電気通信ネットワークの音声チャネルを介してデータを送信するディジタル無線電気通信装置用の帯域内シグナリングモデムであって、前記帯域内シグナリングモデムは、
前記無線電気通信装置内のメモリに格納された、前記無線電気通信装置内のプロセッサで実行可能なソフトウェアを備え、
前記ソフトウェアは、前記音声チャネルを介する送信のために所定の第1のシグナリング波形を生成するように前記プロセッサを制御すべく構成され、前記第1のシグナリング波形は約400−3400Hzの範囲内の周波数を有し、
前記第1のシグナリング波形は、前記音声チャネル内のボコーダによる前記シグナリング波形の歪みを低減するために、波形の開始部においてほぼ零振幅から所定のピーク振幅に徐々に振幅が増加するようにテーパがつけられる、
ことを特徴とする帯域内シグナリングモデム。 - 前記第1のシグナリング波形は波形の終了部において前記ピーク振幅からほぼ零振幅に徐々に振幅が減少するようにテーパがかけられ、
前記第1のシグナリング波形は約1−3秒の範囲内の持続時間を有する、
請求項1記載の帯域内シグナリングモデム。 - 前記ディジタル無線電気通信装置は携帯電話を含む、請求項2記載の帯域内シグナリングモデム。
- 前記無線電気通信装置は自動車に組み込まれ、ディジタル無線電気通信ネットワークの音声チャネルを介して緊急通報のデータを送信する自動動作を行うように構成されている、請求項2記載の帯域内シグナリングモデム。
- 前記第1のシグナリング波形は約3秒の持続時間及び約2kHzより高い周波数を有する、請求項2記載の帯域内シグナリングモデム。
- 前記第1のシグナリング波形は送信前に生成され、前記通信装置内のメモリに格納される、請求項2記載の帯域内シグナリングモデム。
- 前記第1のシグナリング波形は、レガシー検出器との後方互換性のために、約3秒の2225Hzトーンを含む、請求項2記載の帯域内シグナリングモデム。
- 前記ソフトウェアは、前記音声チャネルを介する送信のために組み合わせシグナリング波形を生成するように前記プロセッサを制御すべく構成され、前記組み合わせシグナリング波形は前記第1のシグナリング波形と第2のシグナリング波形を含み、前記第2のシグナリング波形は2つのオーディオ周波数のFSK(位相シフトキーイング)変調により特徴付けられ、前記第1及び第2のシグナリング波形はタンデムに送信される、請求項2記載の帯域内シグナリングモデム。
- 前記第1のシグナリング波形は、ハミング、パーゼン、ガウス、バートレット及びカイザーの窓関数のうちの選択した一つを使用して生成される、請求項8記載の帯域内シグナリングモデム。
- ディジタル無線電気通信ネットワークの音声チャネルを介してデータを送信するために携帯電話内のディジタルプロセッサで実行される機械読み取り可能な記憶媒体に格納されたコンピュータプログラムであって、前記プログラムは前記音声チャネルを介するデータの送信前に、送信のための少なくとも一つのテーパ縁を有する所定のシグナリング波形を送信するように構成されていることを特徴とするコンピュータプログラム。
- ディジタル無線電気通信ネットワークの音声チャネルを介してデータを送信するディジタル無線電気通信装置用の実行可能コードを格納するコンピュータプログラム製品であって、
前記コードは携帯電話内のプロセッサで実行可能であり、
前記コードは、前記音声チャネルを介するデータの送信前に、送信のための組み合わせシグナリング波形を生成するように構成され、前記組み合わせシグナリング波形はボコーダにおける歪みを低減するように選択され、更に、
前記組み合わせシグナリング波形は、少なくとも2つの異なるバーストを含み、各バーストは少なくとも1.0秒の持続時間を有し、前記バーストの少なくとも一つは約2kHzより高い周波数を有するほぼ正弦波形を含み、開始部においてほぼ零振幅から所定のピーク振幅に増加するようテーパがつけられている、
ことを特徴とするコンピュータプログラム製品。 - 前記コードは少なくとも約3秒の総持続時間を有する組み合わせシグナリング波形を生成するように構成されている、請求項11記載のコンピュータプログラム製品。
- 前記第2のバースト波形は2つのオーディオ周波数のFSK(位相シフトキーイング)変調により特徴づけられ、第2のバーストは第1のバーストの前又は後に位置する、請求項12記載のコンピュータプログラム製品。
- 前記第1のバーストは約3秒の2225Hzトーンを含む、請求項11記載のコンピュータプログラム製品。
- オーディオ周波数波形を、低減された歪みでディジタル無線電気通信システムの音声チャネル内のボコーダを通過するように適応させる方法であって、前記方法は、
第1のオーディオ周波数波形を生成し、
前記第1の波形の持続時間を約1−3秒の範囲内の選択した持続時間に広げ、
前記第1の波形がディジタル無線電気通信システムの前記音声チャネルで送信中に所定の低ビットレートボコーダで受け得る歪みを低減するために、前記第1の波形の前縁及び後縁が漸減するように前記第1の波形に窓関数を掛け合わせる、
ことを特徴とする方法。 - 更に、前記第1の波形とタンデムに送信するために第2の波形を生成し、前記第2の波形は2つのオーディオ周波数のFSK(位相シフトキーイング)変調により特徴づけられる、請求項15記載の方法。
- 前記窓関数は、ハミング、パーゼン、ガウス、バートレット及びカイザーの窓関数からなる群から選ばれる、請求項16記載の方法。
- ディジタル無線電気通信ネットワークの音声チャネルを介してディジタルデータを通信する方法であって、
ディジタル入力データを受信し、
前記音声チャネルを介して送信するために前記入力データをオーディオ周波数トーンに符号化し、
シグナリング波形を生成し、
送信側のボコーダを用意させるために最初に前記シグナリング波形を前記音声チャネルを介して送信し、
次に、前記入力データを符号化する前記オーディオ周波数トーンを前記音声チャネルを介して送信する、
ことを特徴とする方法。 - 前記シグナリング波形は、少なくとも2つの異なるバーストをタンデムに含み、各バーストは少なくとも1.0秒の持続時間を有し、前記バーストの少なくとも一つは、前記音声チャネル内のビデオコーダによる前記シグナリング波形の歪みを低減するために、開始部においてほぼ零振幅から所定のピーク振幅に徐々に増加するようテーパがつけられたオーディオ周波数波形を含む、請求項18記載の方法。
- 前記第1のバーストはテーパがつけられ、前記第2のバースト波形は2つのオーディオ周波数のFSK(位相シフトキーイング)変調により特徴づけられる、請求項19記載の方法。
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US9717708P | 2008-09-15 | 2008-09-15 | |
US61/097,177 | 2008-09-15 | ||
US10188008P | 2008-10-01 | 2008-10-01 | |
US61/101,880 | 2008-10-01 | ||
US12/252,284 US7983310B2 (en) | 2008-09-15 | 2008-10-15 | Methods for in-band signaling through enhanced variable-rate codecs |
US12/252,284 | 2008-10-15 | ||
PCT/US2009/056834 WO2010030990A1 (en) | 2008-09-15 | 2009-09-14 | Methods for in-band signaling through enhanced variable-rate codecs |
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CN (1) | CN102150375A (ja) |
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- 2009-09-14 JP JP2011527025A patent/JP5211245B2/ja not_active Expired - Fee Related
- 2009-09-14 KR KR1020117008422A patent/KR101242405B1/ko not_active IP Right Cessation
- 2009-09-14 BR BRPI0918066A patent/BRPI0918066A2/pt not_active IP Right Cessation
- 2009-09-14 EP EP09813752.4A patent/EP2332264A4/en not_active Withdrawn
- 2009-09-14 MX MX2011002660A patent/MX2011002660A/es active IP Right Grant
- 2009-09-14 CN CN2009801360463A patent/CN102150375A/zh active Pending
- 2009-09-14 AU AU2009291547A patent/AU2009291547B2/en not_active Ceased
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- 2009-09-14 WO PCT/US2009/056834 patent/WO2010030990A1/en active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
JP5211245B2 (ja) | 2013-06-12 |
KR20110059763A (ko) | 2011-06-03 |
AU2009291547A1 (en) | 2010-03-18 |
BRPI0918066A2 (pt) | 2015-12-01 |
CA2735135C (en) | 2013-07-23 |
AU2009291547B2 (en) | 2013-05-23 |
MX2011002660A (es) | 2011-06-16 |
US20100067565A1 (en) | 2010-03-18 |
KR101242405B1 (ko) | 2013-03-13 |
CN102150375A (zh) | 2011-08-10 |
WO2010030990A1 (en) | 2010-03-18 |
TW201108634A (en) | 2011-03-01 |
TWI385935B (zh) | 2013-02-11 |
EP2332264A4 (en) | 2015-03-04 |
EP2332264A1 (en) | 2011-06-15 |
US7983310B2 (en) | 2011-07-19 |
CA2735135A1 (en) | 2010-03-18 |
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