JPS6236931A - Decoding device - Google Patents

Decoding device

Info

Publication number
JPS6236931A
JPS6236931A JP17435985A JP17435985A JPS6236931A JP S6236931 A JPS6236931 A JP S6236931A JP 17435985 A JP17435985 A JP 17435985A JP 17435985 A JP17435985 A JP 17435985A JP S6236931 A JPS6236931 A JP S6236931A
Authority
JP
Japan
Prior art keywords
section
decoding
signal
data
error
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.)
Pending
Application number
JP17435985A
Other languages
Japanese (ja)
Inventor
Yoshio Sato
佐藤 好男
Koichi Honma
光一 本間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17435985A priority Critical patent/JPS6236931A/en
Publication of JPS6236931A publication Critical patent/JPS6236931A/en
Pending legal-status Critical Current

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  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To suppress output of excess noise due to transmission error by providing a means outputting an error signal when the change in a decoding signal level is abnormally large and a means applying waveform processing to a decoding signal output in response to an error detection output. CONSTITUTION:When a data is inputted from an input terminal 8 and a correction disable error is detected in an error correction detection section 9, a data separation section 10 separates the input data into a residual signal data and an additional information data such as a residual power forecast coefficient. Then, the residual signal data is inputted to a forecast decoding section 11 and the additional information data is inputted to an additional information decoding section 13, and the decoding section 11 uses the additional information decoded by the decoding section 13 to apply forecast decoding and inputs a decoding signal to a waveform processing section 12. In this case, a signal level detection section 14 detects the decoding signal level from the decoding section 11 and when the change exceeds a prescribed value,an error detection signal is inputted to the processing section 12. Thus, the decoding signal is replaced into a proper waveform at the processing section 12 to suppress output of excess noise due to transmission error.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は伝送誤りが発生する通信回線において、音声を
予測符号化して伝送する際の復号装置に間する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applied to a decoding device for predictively encoding and transmitting speech in a communication line where transmission errors occur.

(従来の技術) 第3図は従来の復号装置を実行するための装置のブロッ
ク図である。第3図において入力端lは □誤り訂正検
出部20入力に接続され、誤り訂正検出部2の出力はデ
ータ分離部3と波形処理部6の入力に接続されている。
(Prior Art) FIG. 3 is a block diagram of a device for implementing a conventional decoding device. In FIG. 3, the input terminal l is connected to the input of the error correction detection section 20, and the output of the error correction detection section 2 is connected to the inputs of the data separation section 3 and the waveform processing section 6.

データ分離部3の出力は予測復号部4と付帯情報復号部
6の人力に接続されている。予測復号部4の出力は波形
処理部5の人力に接続されている。波形処理部5の出力
は出力端7に接続されている。付帯情報復号部6の出力
は予測復号部40入力に接続されている。
The output of the data separation section 3 is connected to the predictive decoding section 4 and the supplementary information decoding section 6 . The output of the predictive decoding section 4 is connected to the human power of the waveform processing section 5. The output of the waveform processing section 5 is connected to an output end 7. The output of the supplementary information decoding section 6 is connected to the input of the predictive decoding section 40.

次に上記の構成による復号装置について説明する。第3
図において入力端1からは保護ビットを含み伝送誤りを
受けたデータが入力される。このデータは験り訂正検出
部2において保護ビットを用いて誤り訂正されてデータ
分離部3に人力される。データ分離部3では入力された
データを残差信号データと残差電力・予測係数等の付帯
情報データに分離し、残差信号データを予測復号部4に
、付帯情報データを付帯情報復号部6にそれぞれ人力す
る。予測復号部4では付帯情報復号部6で復号された付
帯情報を用いて予測復号を行い、復号信号をそのまま出
力端7へ出力するが、誤り訂正検出部2から誤り検出信
号が人力されると、復号信号を適当な信号波形で置換し
て出力端7に出力する。第4図に−1−記従来例の装置
の動作フローチャートを示す。
Next, a decoding device having the above configuration will be explained. Third
In the figure, data that includes protection bits and has undergone transmission errors is input from input terminal 1. This data is subjected to error correction using protection bits in the error correction detection section 2, and then manually input to the data separation section 3. The data separation unit 3 separates the input data into residual signal data and additional information data such as residual power and prediction coefficients, and sends the residual signal data to the predictive decoding unit 4 and the additional information data to the additional information decoding unit 6. Each person uses their own power. The predictive decoding unit 4 performs predictive decoding using the supplementary information decoded by the supplementary information decoding unit 6, and outputs the decoded signal as it is to the output terminal 7. However, when the error detection signal is manually input from the error correction detection unit 2, , replaces the decoded signal with an appropriate signal waveform and outputs it to the output terminal 7. FIG. 4 shows an operation flowchart of the conventional apparatus described in -1-.

(発明が解決しようとする問題点) しかしながら、上記従来の復号装置では伝送誤り率が大
き過ぎて正しく検出できなかった場合や、譲り訂正が不
完全だった場合に、復号処理が発振的になるなどして、
大振幅の雑音を出力するという問題があった。本発明は
このような従来の問題を解決するものであり、伝送誤り
率が大きい場合でも過大な雑音を出力することのない優
れた復号装置を提供することを目的とするものである。
(Problem to be Solved by the Invention) However, in the conventional decoding device described above, when the transmission error rate is too large and cannot be detected correctly, or when yield correction is incomplete, the decoding process becomes oscillating. etc.,
There was a problem that large amplitude noise was output. The present invention is intended to solve such conventional problems, and aims to provide an excellent decoding device that does not output excessive noise even when the transmission error rate is large.

(問題を解決するための手段) 本発明は上記目的を達成するために復号信号の時間的な
変化を検出し、その変化率が統計的に起こり得ないほと
大きい場合に誤り信号を出力する手段と、その誤り検出
出力に応じて復号信号出力に波形処理を施す手段とを有
する。
(Means for Solving the Problem) In order to achieve the above object, the present invention detects a temporal change in a decoded signal, and outputs an error signal when the rate of change is so large that it cannot occur statistically. and means for performing waveform processing on the decoded signal output according to the error detection output.

(作用) 従って、本発明によれば、復号信号レベルの変化率が一
定値を越える場合、出力信号に波形処理を施すことによ
り、過大な復号信号の出力を抑えることができるという
効果を有する。
(Function) Therefore, according to the present invention, when the rate of change in the decoded signal level exceeds a certain value, by applying waveform processing to the output signal, it is possible to suppress the output of an excessive decoded signal.

(実施例) 第1図は本発明の一実施例の構成を示すものである。第
1図において、入力端8は誤り訂正検出部9の人力に接
続され、誤り訂正検出部9の出力はデータ分離部10と
波形処理部120人力に接続される。データ分離部10
の出力は予測復号部11と付帯情報復号部13の入力に
接続される。予測復号部11の出力は波形処理部12と
信号レベル検出部14の入力に接続される。信号レベル
検出部14の出力は波形処理部12の入力に接続されて
いる。
(Embodiment) FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, the input terminal 8 is connected to the power of the error correction detection section 9, and the output of the error correction detection section 9 is connected to the power of the data separation section 10 and the waveform processing section 120. Data separation unit 10
The output of is connected to the input of the predictive decoding section 11 and the supplementary information decoding section 13. The output of the predictive decoding section 11 is connected to the inputs of the waveform processing section 12 and the signal level detection section 14. The output of the signal level detection section 14 is connected to the input of the waveform processing section 12.

次に上記実施例の動作について説明する。入力端8から
は保護ビットを含み伝送誤りを受けたデータが入力され
ると、このデータは誤り訂正検出部9において保護ビッ
ト3を用いて誤り訂正されてデータ分離部10に人力さ
れる。誤り訂正検出部9において訂正不可能な誤りが検
出された場合は、課り検出信号が波形処理部12に人力
される。データ分離部10では人力されたデータを残差
信号データと残差電力・予測係数等の付帯情報データに
分離し、残差信号データを予測復号部IIに、付帯情報
データを付帯情報復号部13にそれぞれ入力する。
Next, the operation of the above embodiment will be explained. When data that includes a protection bit and has undergone a transmission error is input from the input terminal 8, this data is error-corrected in an error correction detection section 9 using the protection bit 3, and then inputted to a data separation section 10. When an uncorrectable error is detected in the error correction detection section 9, an imposition detection signal is manually input to the waveform processing section 12. The data separation unit 10 separates the manually input data into residual signal data and additional information data such as residual power and prediction coefficients, and sends the residual signal data to the predictive decoding unit II and the additional information data to the additional information decoding unit 13. Enter each.

予測復号部11は付帯情報復号部13で復号された付帯
情報を用いて予測復号を行い、復号信号を波形処理部1
2に入力する。波形処理部12は通常状態では復号信号
をそのまま出力端15へ出力するが、誤り訂正検出部9
あるいは信号レベル検出部14から誤り検出信号が人力
されると、復号信号を適当な信号波形で置換して出力端
15に出力する。信号レベル検出部14では予測復号部
11から出力される復号信号レベルを検出し、そのレベ
ルの変化が一定値を越えると波形処理部12に鋏り検出
信号を入力する。第2図に本実施例の動作フローチャー
トを示す。このように本実施例によれは、信号レベル検
出部14で復号信号レベルを検出し、その変化が統計的
にあり得ないほどの大きな場合は、波形処理部I2によ
ってそのときの過大な復号信号の出力を抑えることがで
きるという利点を有する。
The predictive decoding unit 11 performs predictive decoding using the incidental information decoded by the incidental information decoding unit 13, and sends the decoded signal to the waveform processing unit 1.
Enter 2. In the normal state, the waveform processing unit 12 outputs the decoded signal as it is to the output terminal 15, but the error correction detection unit 9
Alternatively, when an error detection signal is manually input from the signal level detection section 14, the decoded signal is replaced with an appropriate signal waveform and outputted to the output terminal 15. The signal level detection section 14 detects the decoded signal level output from the predictive decoding section 11, and inputs a scissor detection signal to the waveform processing section 12 when a change in the level exceeds a certain value. FIG. 2 shows an operational flowchart of this embodiment. As described above, according to the present embodiment, the signal level detection unit 14 detects the decoded signal level, and if the change is statistically impossibly large, the waveform processing unit I2 detects the excessive decoded signal level at that time. This has the advantage that the output can be suppressed.

(発明の効果) 本発明は、以上の説明から明らかなように、復号信号レ
ベルの変化が異常に大きい場合は、復号信号を適当な波
形で置換するようにしたもので、伝送誤りによる過大な
雑音の出力を抑えることができるという効果を有する。
(Effects of the Invention) As is clear from the above description, the present invention is designed to replace the decoded signal with an appropriate waveform when the change in the decoded signal level is abnormally large. This has the effect of suppressing noise output.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例の復号装置の構成を示すブロ
ック図である。第2図は第1図の復号装置の動作フロー
チャートである。 第3図は従来例による復号装置の構成を示すブロック図
である。第4図は第3図の装置の動作フローチャートで
ある。 】・・・入力端、2・・・腰り訂正検出部、3・・・デ
ータ分離部、4・・・予測復号部、5・・・波形処理部
、6・・・付帯情報復号部、7・・・出力端、8・・・
入力端、9・・・誤り訂正検出部、lO・・・データ分
離部、11・・・予測復号部、12・・・波形処理部、
13・・・付帯情報復号部、14・・・信号レベル検出
部、15・・・出力端。 第1図 第3図 第2図
FIG. 1 is a block diagram showing the configuration of a decoding device according to an embodiment of the present invention. FIG. 2 is an operation flowchart of the decoding device shown in FIG. 1. FIG. 3 is a block diagram showing the configuration of a conventional decoding device. FIG. 4 is an operational flowchart of the apparatus shown in FIG. 3. ]... Input end, 2... Hip correction detection section, 3... Data separation section, 4... Predictive decoding section, 5... Waveform processing section, 6... Additional information decoding section, 7... Output end, 8...
Input end, 9...Error correction detection unit, IO...Data separation unit, 11...Prediction decoding unit, 12...Waveform processing unit,
13... Additional information decoding section, 14... Signal level detection section, 15... Output end. Figure 1 Figure 3 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 残差信号とともに予測係数・残差電力等の付帯情報を送
る予測符号化方式の符号を復号する復号装置において、
復号信号レベルを検出しその変化が一定値を越えるとき
誤り検出信号を出力する手段と、前記誤り検出信号に応
答して出力信号に波形処理を施す手段とを設け、伝送誤
りによる過大な出力を抑えるようにしたことを特徴とす
る復号装置。
In a decoding device that decodes a predictive encoding code that sends supplementary information such as predictive coefficients and residual power along with a residual signal,
Means for detecting the decoded signal level and outputting an error detection signal when the change exceeds a certain value, and means for applying waveform processing to the output signal in response to the error detection signal are provided to prevent excessive output due to transmission errors. A decoding device characterized by suppressing the amount of data.
JP17435985A 1985-08-09 1985-08-09 Decoding device Pending JPS6236931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17435985A JPS6236931A (en) 1985-08-09 1985-08-09 Decoding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17435985A JPS6236931A (en) 1985-08-09 1985-08-09 Decoding device

Publications (1)

Publication Number Publication Date
JPS6236931A true JPS6236931A (en) 1987-02-17

Family

ID=15977246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17435985A Pending JPS6236931A (en) 1985-08-09 1985-08-09 Decoding device

Country Status (1)

Country Link
JP (1) JPS6236931A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05191363A (en) * 1992-01-16 1993-07-30 Kokusai Electric Co Ltd Voice decoder
JP2005345993A (en) * 2004-06-07 2005-12-15 Sony Corp Device and method for sound decoding

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5651130A (en) * 1979-10-03 1981-05-08 Victor Co Of Japan Ltd Compensation system for drop-out of digital signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5651130A (en) * 1979-10-03 1981-05-08 Victor Co Of Japan Ltd Compensation system for drop-out of digital signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05191363A (en) * 1992-01-16 1993-07-30 Kokusai Electric Co Ltd Voice decoder
JP2005345993A (en) * 2004-06-07 2005-12-15 Sony Corp Device and method for sound decoding
JP4539180B2 (en) * 2004-06-07 2010-09-08 ソニー株式会社 Acoustic decoding device and acoustic decoding method

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