JP3778976B2 - Insertion circuit for digital mixing equipment - Google Patents

Insertion circuit for digital mixing equipment Download PDF

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JP3778976B2
JP3778976B2 JP30358195A JP30358195A JP3778976B2 JP 3778976 B2 JP3778976 B2 JP 3778976B2 JP 30358195 A JP30358195 A JP 30358195A JP 30358195 A JP30358195 A JP 30358195A JP 3778976 B2 JP3778976 B2 JP 3778976B2
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signal
processing unit
signal processing
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JPH09130347A (en
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博之 鈴木
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Tamura Corp
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Tamura Corp
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【０００１】
【発明の属する技術分野】
この発明は各種放送用、レコーディング用スタジオ等において使用されるオーディオ信号制御用のデジタルミキシング装置に関し、詳しくは外部にオーディオ信号の加工等を行う装置を接続するためのインサーション回路に関する。
【０００２】
【従来の技術】
従来この種のインサーション回路として、例えば図４に示す構成の回路があった。図において１は送信用信号処理部、２は受信信号処理部、３は送信手段、４は受信手段、５はオーディオ信号の加工等を行う外部機器である。
【０００３】
しかして、送信用信号処理部（ＤＳＰ：Digital Signal Processor）１から出力された加工用のデジタルオーディオ信号は、送信手段３であるシリアル送信ポートＴＸよりシリアル通信ライン７を介して外部機器５に送信される。外部機器５ではこのオーディオ信号を受信すると周知の技術手段により、デジタルオーディオ信号に対しエコー、イコライザ等の加工を加える。加工されたオーディオ信号は外部機器５からシリアル通信ライン７を介して受信手段４であるシリアル受信ポートＲＸに送信される。このシリアル受信ポート４は受信したオーディオ信号を内部バス６を介して受信信号処理部２であるＤＳＰに送出する。このＤＳＰ２は受信したオーディオ信号にその他の必要な処理（例えばミキシング等）を行い、放送用等の出力信号とする。
【０００４】
【発明が解決しようとする課題】
しかしながら、このような従来のインサーション回路は送信用信号処理部１→送信手段３→外部機器５→受信手段４→受信信号処理部２という単一の信号経路で構成され、受信手段はオーディオ信号が正常に受信されているか否かの判断を行っていない。しかもモニタ用とは異なり本線の系統であるため、例えば外部機器５が故障する等の異常が生じた場合、オーディオ信号が受信手段４に正常に受信されなくなり、オーディオ信号が途絶えてオンエア中であれば放送信号が途絶えるという放送事故を生じる恐れがあった。
【０００５】
この発明はかかる点に鑑みなされたもので、その目的とするところは、外部機器５からのオーディオ信号が正常に受信されているか否かを判断し、正常に受信されていないと判断したときには受信信号処理部に送出するオーディオ信号を外部機器５に送出するための信号に切り換えることにより、異常信号による放送出力や放送断などの事故の生じないインサーション回路を提供することにある。
【０００６】
【課題を解決するための手段】
上記課題を解決するため本発明は、外部機器５に送信するための信号を送出する送信用信号処理部１と、この送信用信号処理部１からの信号を外部機器５に対し送信する送信手段３と、外部機器５からの信号を受信する受信手段４と、この受信手段４により受信した外部機器５からの信号を入力して出力信号として送出する受信信号処理部２とを備えたデジタルミキシング装置のインサーション回路において、
前記受信手段４と前記受信信号処理部２間には受信手段４が受信したオーディオ信号が正常か否かを受信信号処理部２に送出するエラー信号ライン６ａが接続され、かつ前記送信用信号処理部１、前記受信信号処理部２、前記受信手段４間に切換手段８が設けられ、
前記受信手段４は外部機器５からの信号が正常に受信されているかを判断し、その結果信号を前記エラー信号ライン６ａを介し前記受信信号処理部２に送出し、前記受信信号処理部２は正常に受信されていないと判断した場合には前記切換手段８を介し受信手段４からの信号に換えて、前記送信用信号処理部１から外部機器５に対し送信するための信号を受信信号処理部２に対し送出させることとした。
【０００７】
また、前記受信手段４は外部機器５から受信したシリアル信号フレームの状態により受信信号が正常か否かを判断することとした、
【０００８】
【発明の実施の形態】
次に本発明の実施態様につき図に基づいて説明する。図１は本発明のインサーション回路の基本構成を示すブロック図で、図中１は送信用信号処理部、２は受信信号処理部、３は送信手段、４は受信手段、５はオーディオ信号の加工等を行う外部機器、６は内部バス、６ａはエラー信号ライン、７は通信ライン、８は切換手段である。なお、基本的構成は図４の回路と同一であり、各構成要素の詳細な説明は省略する。
【０００９】
次に動作について説明する。送信用信号処理部１は図に示すように、例えばデジタル信号を高速処理可能なＤＳＰが用いられるが、デジタル信号を処理し得るものであれば汎用のＣＰＵやＲＩＳＣなどを用いても良い。この送信用信号処理部１には図示しない入力ユニットから選択されたオーディオ入力信号等が入力され、フィルタ処理、レベル調整、ミキシング等の処理が加えられる。送信用信号処理部１で所定の処理が行われた送信用のオーディオ信号は内部バス６を介して送信手段３に送られる。送信手段３は、例えばシリアル送信ポートＴＸで構成されている。この送信手段３により送信用オーディオ信号は、通信ライン７を介して外部機器５に送信される。
【００１０】
外部機器５では送られてきたオーディオ信号に対しイコライザ、エコー等の処理を行い、通信ライン７を介して受信手段４に受信用のオーディオ信号を送出する。受信手段４は受信したオーディオ信号が正常な信号か否かを判断し、エラー信号ライン６ａを介して受信信号処理部２に送出する。受信信号処理部２では、受信手段４に入力された信号が正常なものであれば、内部バス６のルートを受信手段４からの信号が受けられるように切換手段８を操作する。
【００１１】
また、外部機器５が故障等により、受信手段４に受信される信号が異常であると判断した場合には、エラー信号ライン６ａを介して受信信号処理部２にエラー信号が送られ、受信信号処理部２は内部バス６のルートを送信用信号処理部１からの信号を受けるように切換手段８を操作する。これにより、受信信号処理部２には送信用信号処理部１からのオーディオ信号が入力され、外部機器５を通さない未処理の信号であるが、音声断等の放送事故は防止できる。
【００１２】
なお、上記の例では送信用信号処理部１と受信信号処理部２とは別個のものとして記載したが、実際の使用に際しては、例えば１つのＤＳＰで外部機器５に対し信号の授受を行うこともできる。また、切換手段８も図では有接点のスイッチとして記載されているが、実際には半導体を用いた信号切換装置や前記ＤＳＰ等の信号プロセッサ内部でのソフトウエアによる選択処理でも良い。
【００１３】
【実施例】
次に、受信オーディオ信号と受信手段４の具体的な実施例について説明する。図２は外部機器５から送られてくる信号のフォーマットを示したもので、シリアルデータの１フレーム分が示されている。そして、周知のようにこのようなフレームデータが複数（例えば１〜１９１）集合して１ブロックのデータとなる。なお、ここでは説明しないが送信データも同様のものである。
【００１４】
このフォーマットはＡＥＳ３−１９９２（Audio Engineering Society)に基づくもので、ビット０〜３が同期のために使用される特定のパターンのプリアンブル、ビット４〜２７はオーディオサンプルワードで、デジタルオーディオサンプルの大きさを表す最下位ビットから最上位ビットまで格納される。なお、ＡＵＸは場合により使用される補助サンプルビットである。Ｖは有効ビットでオーディオサンプルビットがアナログオーディオ信号に適しているかを表す。Ｕはユーザーデータビットで、使用者が何らかの情報を搬送するために使用する。Ｃはチャンネル状態ビットで、それぞれのオーディオチャンネルに付随する情報を搬送する。Ｐはパリティビットで奇数個のエラーの検出を行うためのビットである。
【００１５】
図３は受信手段４の具体的構成例であるデジタルオーディオインターフェースレシーバＩＣの構成を示すブロック図である。図中、端子ＲＸＰ、ＲＸＮに通信ラインを接続し、内部のＲＳ４２２レシーバで受信する。また、内蔵するＰＬＬによりクロックデータを再生する。デジタルオーディオ信号はＳＤＡＴＡ端子より出力され、チャンネルステータスとユーザーデータはそれぞれＣ，Ｕ端子より出力される。ＥＲＲ端子はパリティエラー、バイフェーズ符号違反またはＰＬＬのロックはずれのどれかが発生したときに出力される。
【００１６】
このように、ＥＲＲ端子により受信データにエラーが生じたことがわかる。そして、この各エラー端子の出力を専用のエラー信号ライン６ａを介し、あるいは内部バス６をエラー信号ライン６ａとして使用して、受信信号処理部２に送出することにより、受信信号処理部２は受信手段４の受信信号が正常か否か判断できる。
【００１７】
【発明の効果】
以上のように本発明によれば、外部機器からの信号が異常な時は、この外部機器に対して送信するための信号を直接出力用の信号としているので、
外部機器に異常が生じても、異常なオーディオ信号が放送されたり、オーディオ信号が途絶えてしまうといった事故を未然に防止できる。
【図面の簡単な説明】
【図１】本発明にかかるインサーション回路の基本構成を示すブロック図。
【図２】外部機器からのシリアルデータフォーマットの実施例を示した図。
【図３】受信手段の実施例であるレシーバＩＣの構成を示したブロック図。
【図４】従来のインサーション回路の一例を示した図である。
【符号の説明】
１ 送信用信号処理部
２ 受信信号処理部
３ 送信手段
４ 受信手段
５ 外部機器
６ 内部バス
６ａ エラー信号ライン
７ 通信ライン
８ 切換手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital mixing apparatus for audio signal control used in various broadcasting and recording studios, and more particularly to an insertion circuit for connecting an apparatus for processing an audio signal to the outside.
[0002]
[Prior art]
Conventionally, as this type of insertion circuit, for example, there has been a circuit having a configuration shown in FIG. In the figure, reference numeral 1 denotes a transmission signal processing unit, 2 denotes a reception signal processing unit, 3 denotes transmission means, 4 denotes reception means, and 5 denotes an external device for processing an audio signal.
[0003]
Thus, the processing digital audio signal output from the transmission signal processing unit (DSP: Digital Signal Processor) 1 is transmitted from the serial transmission port TX as the transmission means 3 to the external device 5 through the serial communication line 7. Is done. Upon receiving this audio signal, the external device 5 applies processing such as echo and equalizer to the digital audio signal by known technical means. The processed audio signal is transmitted from the external device 5 via the serial communication line 7 to the serial reception port RX which is the reception means 4. The serial reception port 4 sends the received audio signal to the DSP as the reception signal processing unit 2 via the internal bus 6. The DSP 2 performs other necessary processing (for example, mixing) on the received audio signal to obtain an output signal for broadcasting or the like.
[0004]
[Problems to be solved by the invention]
However, such a conventional insertion circuit is composed of a single signal path of transmission signal processing unit 1 → transmission unit 3 → external device 5 → reception unit 4 → reception signal processing unit 2, and the reception unit is an audio signal. It is not judged whether or not is received normally. Moreover, since it is a main line system unlike the monitor, if an abnormality such as a failure of the external device 5 occurs, the audio signal is not normally received by the receiving means 4, and the audio signal is interrupted and is on air. This could cause a broadcast accident that the broadcast signal was interrupted.
[0005]
The present invention has been made in view of the above points, and the object of the present invention is to determine whether or not an audio signal from the external device 5 is normally received, and to receive when it is determined that the audio signal is not normally received. An object of the present invention is to provide an insertion circuit that does not cause an accident such as broadcast output or broadcast interruption due to an abnormal signal by switching an audio signal to be sent to a signal processing unit to a signal to be sent to an external device 5.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a transmission signal processing unit 1 for transmitting a signal to be transmitted to an external device 5 and a transmission means for transmitting a signal from the transmission signal processing unit 1 to the external device 5. 3, a receiving means 4 for receiving a signal from the external device 5, and a received signal processing unit 2 for receiving a signal from the external device 5 received by the receiving means 4 and sending it as an output signal In the insertion circuit of the device,
An error signal line 6a is connected between the receiving means 4 and the received signal processing section 2 to send to the received signal processing section 2 whether or not the audio signal received by the receiving means 4 is normal, and the transmission signal processing. A switching unit 8 is provided between the unit 1, the received signal processing unit 2, and the receiving unit 4.
The receiving means 4 determines whether the signal from the external device 5 is normally received, and sends the result signal to the received signal processing unit 2 via the error signal line 6a. The received signal processing unit 2 When it is determined that the signal is not normally received, a signal for transmission from the transmission signal processing unit 1 to the external device 5 is received signal processing instead of the signal from the reception unit 4 via the switching unit 8. It was decided to send to part 2.
[0007]
The receiving means 4 determines whether the received signal is normal or not according to the state of the serial signal frame received from the external device 5.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a basic configuration of an insertion circuit according to the present invention, in which 1 is a signal processing unit for transmission, 2 is a received signal processing unit, 3 is transmitting means, 4 is receiving means, and 5 is an audio signal. External equipment for processing, 6 is an internal bus, 6a is an error signal line, 7 is a communication line, and 8 is a switching means. The basic configuration is the same as that of the circuit of FIG. 4, and detailed description of each component is omitted.
[0009]
Next, the operation will be described. As shown in the figure, for example, a DSP capable of high-speed processing of digital signals is used as the transmission signal processing unit 1. However, a general-purpose CPU or RISC may be used as long as it can process digital signals. The transmission signal processing unit 1 receives an audio input signal or the like selected from an input unit (not shown), and is subjected to processing such as filtering, level adjustment, and mixing. The audio signal for transmission that has undergone predetermined processing in the transmission signal processing unit 1 is sent to the transmission means 3 via the internal bus 6. The transmission means 3 is constituted by a serial transmission port TX, for example. The transmission audio signal is transmitted to the external device 5 through the communication line 7 by the transmission means 3.
[0010]
The external device 5 performs processing such as equalizer and echo on the sent audio signal, and sends a receiving audio signal to the receiving means 4 via the communication line 7. The receiving means 4 determines whether or not the received audio signal is a normal signal, and sends it to the received signal processing unit 2 via the error signal line 6a. In the reception signal processing unit 2, if the signal input to the reception unit 4 is normal, the switching unit 8 is operated so that the signal from the reception unit 4 can be received through the route of the internal bus 6.
[0011]
When the external device 5 determines that the signal received by the receiving means 4 is abnormal due to a failure or the like, an error signal is sent to the received signal processing unit 2 via the error signal line 6a, and the received signal The processing unit 2 operates the switching means 8 so as to receive a signal from the transmission signal processing unit 1 through the route of the internal bus 6. As a result, although the audio signal from the transmission signal processing unit 1 is input to the reception signal processing unit 2 and is an unprocessed signal that does not pass through the external device 5, broadcast accidents such as audio interruption can be prevented.
[0012]
In the above example, the transmission signal processing unit 1 and the reception signal processing unit 2 are described as separate units. However, in actual use, for example, a single DSP exchanges signals with the external device 5. You can also. Further, the switching means 8 is also described as a contact switch in the figure, but actually, it may be a selection process by software inside a signal switching device using a semiconductor or a signal processor such as the DSP.
[0013]
【Example】
Next, specific examples of the received audio signal and the receiving means 4 will be described. FIG. 2 shows the format of a signal sent from the external device 5 and shows one frame of serial data. As is well known, a plurality of such frame data (for example, 1 to 191) are aggregated to form one block of data. Although not described here, the transmission data is the same.
[0014]
This format is based on AES3-1992 (Audio Engineering Society). Bits 0 to 3 are a specific pattern preamble used for synchronization, bits 4 to 27 are audio sample words, and the size of a digital audio sample. Are stored from the least significant bit to the most significant bit. AUX is an auxiliary sample bit used in some cases. V is a valid bit and represents whether the audio sample bit is suitable for an analog audio signal. U is a user data bit that is used by the user to carry some information. C is a channel status bit that carries information associated with each audio channel. P is a parity bit for detecting an odd number of errors.
[0015]
FIG. 3 is a block diagram showing a configuration of a digital audio interface receiver IC which is a specific configuration example of the receiving means 4. In the figure, a communication line is connected to terminals RXP and RXN, and reception is performed by an internal RS422 receiver. In addition, the clock data is reproduced by a built-in PLL. The digital audio signal is output from the SDATA terminal, and the channel status and user data are output from the C and U terminals, respectively. The ERR terminal is output when a parity error, biphase code violation, or PLL lock out occurs.
[0016]
Thus, it can be seen that an error has occurred in the received data at the ERR terminal. The output of each error terminal is sent to the reception signal processing unit 2 through the dedicated error signal line 6a or the internal bus 6 as the error signal line 6a, so that the reception signal processing unit 2 receives the signal. It can be determined whether the received signal of the means 4 is normal.
[0017]
【The invention's effect】
As described above, according to the present invention, when the signal from the external device is abnormal, the signal to be transmitted to the external device is a signal for direct output.
Even if an abnormality occurs in the external device, it is possible to prevent an accident such as an abnormal audio signal being broadcast or an audio signal being interrupted.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a basic configuration of an insertion circuit according to the present invention.
FIG. 2 is a diagram showing an example of a serial data format from an external device.
FIG. 3 is a block diagram showing a configuration of a receiver IC which is an embodiment of a receiving unit.
FIG. 4 is a diagram showing an example of a conventional insertion circuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transmission signal processing part 2 Reception signal processing part 3 Transmission means 4 Reception means 5 External apparatus 6 Internal bus 6a Error signal line 7 Communication line 8 Switching means

Claims (2)

外部機器に送信するための信号を送出する送信用信号処理部と、この送信用信号処理部からの信号を外部機器に対し送信する送信手段と、外部機器からの信号を受信する受信手段と、この受信手段により受信した外部機器からの信号を入力して出力信号として送出する受信信号処理部とを備えたデジタルミキシング装置のインサーション回路において、
前記受信手段と前記受信信号処理部間には受信手段が受信したオーディオ信号が正常か否かを受信信号処理部に送出するエラー信号ラインが接続され、かつ前記送信用信号処理部、前記受信信号処理部、前記受信手段間に切換手段が設けられ、
前記受信手段は外部機器からの信号が正常に受信されているかを判断し、その結果信号を前記エラー信号ラインを介し前記受信信号処理部に送出し、前記受信信号処理部は正常に受信されていないと判断した場合には前記切換手段を介し受信手段からの信号に換えて、前記送信用信号処理部から外部機器に対し送信するための信号を受信信号処理部に対し送出させることを特徴とするデジタルミキシング装置のインサーション回路。A transmission signal processing unit for transmitting a signal for transmission to an external device, a transmission unit for transmitting a signal from the transmission signal processing unit to the external device, a reception unit for receiving a signal from the external device, In an insertion circuit of a digital mixing device comprising a received signal processing unit that inputs a signal from an external device received by the receiving means and sends it as an output signal,
An error signal line for transmitting to the reception signal processing unit whether or not the audio signal received by the reception unit is normal is connected between the reception unit and the reception signal processing unit, and the transmission signal processing unit and the reception signal A switching means is provided between the processing unit and the receiving means,
The receiving means determines whether a signal from an external device is normally received, and sends a result signal to the reception signal processing unit via the error signal line, and the reception signal processing unit is normally received. If it is determined that there is no instead of the signal from the receiving means via said switching means, and characterized in that cause sending to the reception signal processing unit a signal to transmit to the external apparatus from the transmission signal processing unit Insertion circuit for digital mixing equipment. 前記受信手段は外部機器から受信したシリアル信号フレームの状態により受信信号が正常か否かを判断することを特徴とする請求項１記載のデジタルミキシング装置のインサーション回路。  2. An insertion circuit for a digital mixing apparatus according to claim 1, wherein said receiving means determines whether or not a received signal is normal according to a state of a serial signal frame received from an external device.
JP30358195A 1995-10-26 1995-10-26 Insertion circuit for digital mixing equipment Expired - Lifetime JP3778976B2 (en)

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Applications Claiming Priority (1)

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JP30358195A JP3778976B2 (en) 1995-10-26 1995-10-26 Insertion circuit for digital mixing equipment

Publications (2)

Publication Number Publication Date
JPH09130347A JPH09130347A (en) 1997-05-16
JP3778976B2 true JP3778976B2 (en) 2006-05-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP30358195A Expired - Lifetime JP3778976B2 (en) 1995-10-26 1995-10-26 Insertion circuit for digital mixing equipment

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JP (1) JP3778976B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012070080A1 (en) * 2010-11-22 2012-05-31 パイオニア株式会社 Playback control device, playback system, and method and program for controlling playback control device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56166614A (en) * 1980-05-27 1981-12-21 Sony Corp Mixing console
JPS62109450A (en) * 1985-11-07 1987-05-20 Hitachi Cable Ltd Bypass method for node station of loop network
JP2769844B2 (en) * 1989-03-31 1998-06-25 アンリツ株式会社 Spectrum analyzer
JPH05304443A (en) * 1992-03-25 1993-11-16 Sony Corp Digital audio signal processor
JPH05275945A (en) * 1992-03-25 1993-10-22 Sony Corp Level displaying device for digital audio signal
JP3230308B2 (en) * 1992-12-04 2001-11-19 ヤマハ株式会社 Ring LAN
JPH06232664A (en) * 1993-01-29 1994-08-19 Sony Corp Mixer
JPH06310957A (en) * 1993-04-26 1994-11-04 Sony Corp Digital mixer
JPH096350A (en) * 1993-11-02 1997-01-10 Yamaha Corp Effect adding device and electronic musical instrument using the same

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JPH09130347A (en) 1997-05-16

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