JP7162247B2 - 受信装置及び受信方法 - Google Patents
受信装置及び受信方法 Download PDFInfo
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- 230000005236 sound signal Effects 0.000 claims description 106
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
- H04H40/72—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for noise suppression
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- 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
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L21/0232—Processing in the frequency domain
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- 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
- G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
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- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
- G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
- H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
- H04B1/1669—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal
- H04B1/1676—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal of the sum or difference signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
- G10L25/51—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B2001/1054—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal by changing bandwidth
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Noise Elimination (AREA)
Description
本実施の形態では、本開示に係る受信装置及び受信方法の一例として、FM放送受信用のラジオ受信機に適用した構成例について説明する。
図3は、実施の形態に係るハイカット処理の動作を説明するためのフローチャートである。
図5は、音声信号が中域型の曲調の場合のハイカット処理の一例を示す特性図であり、図6は、音声信号が高域型の曲調の場合のハイカット処理の一例を示す特性図である。図5及び図6は、実施の形態の効果を説明するものであり、横軸に時間をとり縦軸に周波数をとって、ハイカット処理による周波数特性の変化を示している。図5及び図6において、左側がハイカット処理前、右側がハイカット処理後のそれぞれの周波数特性を示している。
12 アンテナ
13 受信部
14 復調部
15 ハイカットフィルタ部
16 オーディオアンプ
17 スピーカ
18 ノイズ検出部
19 変調度検出部
20 受信電界強度検出部
21 中域検出部
22 高域検出部
Claims (8)
- 音声信号が含まれる放送信号を受信して受信信号のベースバンド信号を取得する受信部と、
前記ベースバンド信号を復調して音声信号を取得する復調部と、
前記ベースバンド信号の周波数帯域における中域成分のレベルを検出する中域検出部と、
前記ベースバンド信号の周波数帯域における高域成分のレベルを検出する高域検出部と、
前記受信信号のキャリアノイズレシオを検出する受信電界強度検出部と、
前記音声信号のハイカット処理の効果量を設定する処理部と、
前記設定したハイカット処理の効果量に従って前記音声信号のハイカット処理を行うハイカットフィルタ部と、を備え、
前記処理部は、前記キャリアノイズレシオが所定値以下の場合に前記効果量を所定の一定値に設定し、前記キャリアノイズレシオが前記所定値よりも大きい場合、前記中域成分のレベルと前記高域成分のレベルとのレベル差に基づいて前記効果量を設定する、
受信装置。 - 請求項1に記載の受信装置であって、
前記処理部は、前記レベル差が所定値より小さい場合に前記効果量を小さくする、受信装置。 - 請求項1に記載の受信装置であって、
前記処理部は、前記レベル差が所定値より大きい場合に前記効果量を大きくする、受信装置。 - 請求項1に記載の受信装置であって、
前記受信信号の変調度を検出する変調度検出部を有し、
前記処理部は、
前記変調度に基づいて前記効果量を設定する、受信装置。 - 請求項4に記載の受信装置であって、
前記処理部は、前記変調度が所定値より大きい場合に前記効果量を小さくする、受信装置。 - 請求項4に記載の受信装置であって、
前記処理部は、前記変調度が所定値より小さい場合に前記効果量を大きくする、受信装置。 - 請求項1に記載の受信装置であって、
前記受信信号のノイズレベルを検出するノイズ検出部を有し、
前記処理部は、前記ノイズレベルが所定値よりも小さい場合に前記ハイカット処理を停止させる、受信装置。 - 音声信号が含まれる放送信号を受信する受信装置における受信方法であって、
前記放送信号を受信して受信信号のベースバンド信号を取得し、
前記ベースバンド信号を復調して音声信号を取得し、
前記ベースバンド信号の周波数帯域における中域成分のレベルを検出し、
前記ベースバンド信号の周波数帯域における高域成分のレベルを検出し、
前記受信信号のキャリアノイズレシオを検出し、
処理部により、前記音声信号のハイカット処理の効果量を設定し、
前記設定したハイカット処理の効果量に従ってハイカットフィルタ部において前記音声信号のハイカット処理を行い、
前記処理部は、前記キャリアノイズレシオが所定値以下の場合に前記効果量を所定の一定値に設定し、前記キャリアノイズレシオが前記所定値よりも大きい場合、前記中域成分のレベルと前記高域成分のレベルとのレベル差に基づいて前記効果量を設定する、
受信方法。
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JP2018232285A JP7162247B2 (ja) | 2018-12-12 | 2018-12-12 | 受信装置及び受信方法 |
US16/711,820 US10789970B2 (en) | 2018-12-12 | 2019-12-12 | Receiving device and receiving method |
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JP2018232285A JP7162247B2 (ja) | 2018-12-12 | 2018-12-12 | 受信装置及び受信方法 |
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JP2020096268A JP2020096268A (ja) | 2020-06-18 |
JP7162247B2 true JP7162247B2 (ja) | 2022-10-28 |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001060923A (ja) | 1999-08-24 | 2001-03-06 | Alpine Electronics Inc | Fm放送受信機 |
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US1034917A (en) | 1909-05-13 | 1912-08-06 | Westinghouse Lamp Co | Means for constructing incandescent lamps. |
US4042883A (en) | 1976-03-25 | 1977-08-16 | Motorola, Inc. | Automatic noise limiter |
US4761829A (en) | 1985-11-27 | 1988-08-02 | Motorola Inc. | Adaptive signal strength and/or ambient noise driven audio shaping system |
JPS6385929A (ja) | 1986-09-30 | 1988-04-16 | Toshiba Corp | フアイル検索装置 |
US5371803A (en) * | 1990-08-31 | 1994-12-06 | Bellsouth Corporation | Tone reduction circuit for headsets |
US5550925A (en) * | 1991-01-07 | 1996-08-27 | Canon Kabushiki Kaisha | Sound processing device |
JPH0613923A (ja) * | 1992-06-24 | 1994-01-21 | Victor Co Of Japan Ltd | オーディオ再生装置 |
DE69527731T2 (de) * | 1994-05-18 | 2003-04-03 | Nippon Telegraph & Telephone Co., Tokio/Tokyo | Sender-Empfänger mit einem akustischen Wandler vom Ohrpassstück-Typ |
JPH0879204A (ja) * | 1994-09-02 | 1996-03-22 | Fujitsu Ten Ltd | 受信機 |
JPH0879203A (ja) * | 1994-09-02 | 1996-03-22 | Matsushita Electric Ind Co Ltd | 雑音抑圧装置 |
JP3407253B2 (ja) * | 2001-06-20 | 2003-05-19 | 富士通株式会社 | ピーク抑圧方法及びデータ伝送装置 |
EP2581904B1 (en) * | 2010-06-11 | 2015-10-07 | Panasonic Intellectual Property Corporation of America | Audio (de)coding apparatus and method |
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2018
- 2018-12-12 JP JP2018232285A patent/JP7162247B2/ja active Active
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- 2019-12-12 US US16/711,820 patent/US10789970B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001060923A (ja) | 1999-08-24 | 2001-03-06 | Alpine Electronics Inc | Fm放送受信機 |
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US20200194024A1 (en) | 2020-06-18 |
US10789970B2 (en) | 2020-09-29 |
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