JP2019507514A - 帯域内オンチャネル無線システム内で音声信号を混合する際のレベル制御の方法及びそのための装置 - Google Patents
帯域内オンチャネル無線システム内で音声信号を混合する際のレベル制御の方法及びそのための装置 Download PDFInfo
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- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
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- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
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Abstract
【選択図】図4
Description
92 アナログ信号経路
110、112 ライン
120、108 復調器
128 シフト値
Claims (20)
- デジタル音声放送信号を処理する方法であって、
(a)前記デジタル音声放送信号のデジタル音声部分から該デジタル音声放送信号のアナログ音声部分を分離する段階、
(b)第1の短い時間間隔にわたって前記アナログ音声部分の音量を決定する段階、
(c)前記第1の短い時間間隔にわたって前記デジタル音声部分の音量を決定する段階、
(d)前記アナログ音声部分の前記音量及び前記デジタル音声部分の前記音量を用いて短期平均利得を計算する段階、
(e)長期平均利得を決定する段階、
(f)前記長期平均利得又は前記短期平均利得のうちの一方をdBに変換する段階、
(g)出力がデジタルに混合されていた場合に、デジタル利得パラメータを事前選択された区分だけ調節して調節デジタル利得パラメータを生成する段階、
(h)出力がデジタルに混合されていなかった場合に、前記デジタル利得パラメータを前記短期平均利得に設定する段階、
(i)前記デジタル利得パラメータを音声プロセッサに提供する段階、及び
(j)第2の短い時間間隔を用いて段階(a)から(i)を繰り返す段階、
を含むことを特徴とする方法。 - 前記短期平均利得は、アナログ音声電力及びデジタル音声電力の線形比率である、
ことを特徴とする請求項1に記載の方法。 - 前記デジタル利得パラメータは、前記短期平均利得に向けて調節され、前記事前選択された区分は、1dBである、
ことを特徴とする請求項1に記載の方法。 - 前記長期平均利得は、前記短期平均利得の移動平均を含む、
ことを特徴とする請求項1に記載の方法。 - 前記長期平均利得は、前記短期平均利得とは独立して決定される、
ことを特徴とする請求項1に記載の方法。 - 前記長期平均利得は、長い時間間隔が満足された場合にdBに変換され、前記短期平均利得は、該長い時間間隔が満足されなかった場合にdBに変換される、
ことを特徴とする請求項1に記載の方法。 - 前記長い時間間隔は、前記短い時間間隔の整数倍を含むことを特徴とする請求項6に記載の方法。
- 前記短い時間間隔は、1から5秒の範囲にあり、前記長い時間間隔は、5から30秒の範囲にある、
ことを特徴とする請求項6に記載の方法。 - 前記アナログ音声部分は、サンプルのアナログ変調されたプログラムマテリアルのストリームを含み、
前記デジタル音声部分は、サンプルのデジタル変調されたプログラムマテリアルのストリームを含む、
ことを特徴とする請求項1に記載の方法。 - 前記アナログ音声部分及び前記デジタル音声部分の前記レベルの前記測定は、ITU 1770仕様に従って行われることを特徴とする請求項1に記載の方法。
- (a)デジタル音声放送信号のアナログ音声部分を該デジタル音声放送信号のデジタル音声部分から分離し、
(b)第1の短い時間間隔にわたって前記アナログ音声部分の音量を決定し、
(c)前記第1の短い時間間隔にわたって前記デジタル音声部分の音量を決定し、
(d)前記アナログ音声部分の前記音量及び前記デジタル音声部分の前記音量を用いて短期平均利得を計算し、
(e)長期平均利得を決定し、
(f)前記長期平均利得又は前記短期平均利得のうちの一方をdBに変換し、
(g)出力がデジタルに混合されていた場合に、デジタル利得パラメータを事前選択された区分だけ調節して調節デジタル利得パラメータを生成し、
(h)出力がデジタルに混合されていなかった場合に、前記デジタル利得パラメータを前記短期平均利得に設定し、
(i)前記デジタル利得パラメータを音声プロセッサに提供し、かつ
(j)第2の短い時間間隔を用いて段階(a)から(i)を繰り返す、
ように構成された処理回路、
を含むことを特徴とする無線受信機。 - 前記短期平均利得は、アナログ音声電力及びデジタル音声電力の線形比率である、
ことを特徴とする請求項11に記載の無線受信機。 - 前記デジタル利得パラメータは、前記短期平均利得に向けて調節され、前記事前選択された区分は、1dBである、
ことを特徴とする請求項11に記載の無線受信機。 - 前記長期平均利得は、前記短期平均利得の移動平均を含む、
ことを特徴とする請求項11に記載の無線受信機。 - 前記長期平均利得は、前記短期平均利得とは独立して決定される、
ことを特徴とする請求項11に記載の無線受信機。 - 前記長期平均利得は、長い時間間隔が満足された場合にdBに変換され、前記短期平均利得は、該長い時間間隔が満足されなかった場合にdBに変換される、
ことを特徴とする請求項11に記載の無線受信機。 - 前記長い時間間隔は、前記短い時間間隔の整数倍を含むことを特徴とする請求項16に記載の無線受信機。
- 前記短い時間間隔は、1から5秒の範囲にあり、前記長い時間間隔は、5から30秒の範囲にある、
ことを特徴とする請求項16に記載の無線受信機。 - 前記アナログ音声部分は、サンプルのアナログ変調されたプログラムマテリアルのストリームを含み、
前記デジタル音声部分は、サンプルのデジタル変調されたプログラムマテリアルのストリームを含む、
ことを特徴とする請求項11に記載の無線受信機。 - 前記アナログ音声部分及び前記デジタル音声部分の前記レベルの前記測定は、ITU 1770仕様に従って行われることを特徴とする請求項11に記載の無線受信機。
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US14/974,809 | 2015-12-18 | ||
PCT/US2016/067118 WO2017106612A1 (en) | 2015-12-18 | 2016-12-16 | Method and apparatus for level control in blending an audio signal in an in-band on-channel radio system |
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JP2021034796A (ja) * | 2019-08-20 | 2021-03-01 | パナソニックIpマネジメント株式会社 | 受信装置 |
JP7262080B2 (ja) | 2019-08-20 | 2023-04-21 | パナソニックIpマネジメント株式会社 | 受信装置 |
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CA3008923A1 (en) | 2017-06-22 |
KR20180095858A (ko) | 2018-08-28 |
EP3391562A1 (en) | 2018-10-24 |
MX2018007444A (es) | 2018-11-09 |
JP6812442B2 (ja) | 2021-01-13 |
TWI761325B (zh) | 2022-04-21 |
CN108604939B (zh) | 2020-03-10 |
WO2017106612A1 (en) | 2017-06-22 |
CA3008923C (en) | 2023-06-27 |
USRE49210E1 (en) | 2022-09-13 |
US20170179899A1 (en) | 2017-06-22 |
US9755598B2 (en) | 2017-09-05 |
CN108604939A (zh) | 2018-09-28 |
EP3391562B1 (en) | 2021-05-19 |
TW201729575A (zh) | 2017-08-16 |
KR102571908B1 (ko) | 2023-08-28 |
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