JPH0774733A - Digital radio telephone set - Google Patents

Digital radio telephone set

Info

Publication number
JPH0774733A
JPH0774733A JP5216193A JP21619393A JPH0774733A JP H0774733 A JPH0774733 A JP H0774733A JP 5216193 A JP5216193 A JP 5216193A JP 21619393 A JP21619393 A JP 21619393A JP H0774733 A JPH0774733 A JP H0774733A
Authority
JP
Japan
Prior art keywords
error correction
data
error
section
unit
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
JP5216193A
Other languages
Japanese (ja)
Inventor
Yoshiaki Seguchi
義昭 瀬口
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 JP5216193A priority Critical patent/JPH0774733A/en
Publication of JPH0774733A publication Critical patent/JPH0774733A/en
Pending legal-status Critical Current

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  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To attain talking with excellent quality by providing an error correction code addition section to a transmission section, providing an error correction section to a reception section and adding an error correction code automatically to make communication when reception data quality is deteriorated. CONSTITUTION:A voice is coded by a voice coding section 5, resulting data are inputted to an important data separate section 8, in which data are separated into important data D1 and non-important data D2. The data D1 are inputted to an error correction code generating section 9, in which an error check code S1 is generated and synthesized with the data D1 by a coding side synthesis section 10 and the result is sent. Received radio data are inputted to a reception quality evaluation section 3 and when quality of received data is excellent, an input signal is bypassed and a voice signal is outputted by a decoding side changeover section 16. When reception data quality is wrong, an error detection output signal is outputted and error correction processing is executed by an error correction section 7. That is, an error check code S2 and the important data D3 are corrected by a correction execution section 13 and error corrected data D4 are outputted.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はディジタル無線電話装置
に関し、特に受信データ品質が悪化したときに自動的に
誤り訂正を付加して通話を行うものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital radiotelephone apparatus, and more particularly to a telephone which automatically adds error correction when the quality of received data deteriorates.

【0002】[0002]

【従来の技術】近年、無線電話装置は、その利便性,経
済性での向上とともに広く利用されるようになってお
り、その中でも特に自動車電話,構内電話などとしてセ
ルラー電話機およびコードレス電話機が普及してきてい
る。
2. Description of the Related Art In recent years, wireless telephone devices have come to be widely used along with their convenience and economy, and in particular, cellular telephones and cordless telephones have become popular as car telephones, private telephones and the like. ing.

【0003】以下、図面を参照しながら従来のディジタ
ル無線電話装置について説明を行う。
A conventional digital radio telephone device will be described below with reference to the drawings.

【0004】図3は従来のディジタル無線電話装置の構
成を示すブロック図であり、図3において、1は無線電
話サービス網に無線データを送信する送信側無線部、2
は無線データを受信する受信側無線部、3は、受信側無
線部2から出力される受信データの品質が予め設定され
た値以下の場合に、エラー検知出力信号を出力する受信
品質評価部、4は指示により音声出力をミュート可能な
音声復号化部、5は音声符号化部である。なお、SPは
スピーカ、Micはマイクロホンである。
FIG. 3 is a block diagram showing the configuration of a conventional digital radio telephone apparatus. In FIG. 3, reference numeral 1 denotes a transmitting side radio section for transmitting radio data to a radio telephone service network, and 2
Is a reception side radio unit for receiving radio data, 3 is a reception quality evaluation unit for outputting an error detection output signal when the quality of the reception data output from the reception side radio unit 2 is equal to or less than a preset value, Reference numeral 4 is a voice decoding unit capable of muting a voice output according to an instruction, and 5 is a voice encoding unit. Note that SP is a speaker and Mic is a microphone.

【0005】以上のように構成された従来のディジタル
無線電話装置について、以下その動作を説明する。
The operation of the conventional digital radiotelephone device configured as described above will be described below.

【0006】ディジタル無線電話装置は、既に無線電話
サービス網に接続され、通話状態にあるとする。マイク
ロホンMicからの音声信号は、音声符号化部5により必
要に応じて圧縮されて符号化される。符号化データは送
信側無線部1により無線データとして無線電話サービス
網へ送信される。一方、無線電話サービス網からのデー
タは受信側無線部2により受信され、受信品質評価部3
に入力されるとともに音声復号化部4へ入力され、音声
信号としてスピーカSPから出力される。一方、受信品
質評価部3で受信データ品質が低下した場合に、エラー
検知出力信号が音声復号化部4へ入力され出力音声がミ
ュートされる。このようにして、受信エラー発生時のス
ピーカからの雑音発生を阻止する。
It is assumed that the digital radio telephone device is already connected to the radio telephone service network and is in a call state. The voice signal from the microphone Mic is compressed and encoded by the voice encoding unit 5 as necessary. The encoded data is transmitted to the wireless telephone service network as wireless data by the transmitting side wireless unit 1. On the other hand, data from the wireless telephone service network is received by the receiving side wireless unit 2 and received by the reception quality evaluation unit 3.
Is input to the voice decoding unit 4 and is output from the speaker SP as a voice signal. On the other hand, when the reception data quality is deteriorated by the reception quality evaluation unit 3, the error detection output signal is input to the voice decoding unit 4 and the output voice is muted. In this way, the generation of noise from the speaker when a reception error occurs is prevented.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、上記し
た従来のディジタル無線電話装置では、受信エラーが頻
繁に発生するとミュートが多発し、通話に支障をきたす
という問題点を有していた。
However, the above-mentioned conventional digital radio telephone apparatus has a problem that if a reception error occurs frequently, mute frequently occurs, which hinders communication.

【0008】また、この問題を解決するために誤り訂正
機能を組み込むと、データ全体のビットレートが増大し
通信帯域幅が拡大し、周波数利用効率の低下、もしくは
通信帯域幅を一定とするために音声符号化部の符号化率
を高くすると、音声品質の劣化という問題点を有してお
り、さらにエラー発生時に誤り訂正を行うプロトコルを
組み込むと制御が複雑になるという問題点を有してい
た。
If an error correction function is incorporated to solve this problem, the bit rate of the entire data increases, the communication bandwidth increases, the frequency utilization efficiency decreases, or the communication bandwidth becomes constant. When the coding rate of the voice coding unit is increased, there is a problem that the voice quality is deteriorated, and when a protocol for performing error correction when an error occurs is incorporated, control becomes complicated. .

【0009】本発明は上記課題を解決し、受信エラー発
生時に限り誤り訂正を行うことで音声の劣化を最小限に
とどめ、かつ簡易な手段で誤り訂正切り換えが可能な無
線電話装置を提供することを目的としている。
The present invention solves the above problems and provides a radiotelephone device capable of minimizing voice deterioration by performing error correction only when a reception error occurs and capable of error correction switching by a simple means. It is an object.

【0010】[0010]

【課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、受信データの品質が予め設定された値以下
の場合にエラー検知出力信号を出力する受信品質評価手
段と、受信データに対して前記エラー検知出力信号が出
力されている場合に誤り訂正を行う誤り訂正部および前
記誤り訂正部の出力を音声信号に復号化する音声復号化
部とを有する受信手段と、音声信号を符号化する音声符
号化部および前記エラー検知出力信号が出力されている
場合に誤り訂正符号を付加する誤り訂正符号付加部を有
する送信手段とを備えたものである。
In order to achieve the above object, the present invention provides reception quality evaluation means for outputting an error detection output signal when the quality of received data is equal to or lower than a preset value, and reception quality evaluation means. On the other hand, a receiving unit having an error correction unit that performs error correction when the error detection output signal is output and a voice decoding unit that decodes the output of the error correction unit into a voice signal, and a voice signal is encoded. And a transmission means having an error correction code addition unit for adding an error correction code when the error detection output signal is output.

【0011】[0011]

【作用】本発明は上記した構成により、受信データ品質
が悪化したときに自動的に誤り訂正符号を付加して通話
を行うことができるものである。
According to the present invention, with the above configuration, when the received data quality deteriorates, an error correction code can be automatically added to make a call.

【0012】[0012]

【実施例】図1は本発明の一実施例におけるディジタル
無線電話装置の構成を示すブロック図である。図1にお
いて、送信手段における6は誤り訂正符号付加部であ
り、この誤り訂正符号付加部6における8は音声符号化
データを重要データ(音質に大きく影響する部分)と非重
要データ(音質にあまり影響しない部分)に分離する重要
データ分離部、9は重要データ分離部8で分離された重
要データに対して、長さが非重要データと等しい誤り訂
正符号を生成する誤り訂正符号生成部、10は前記重要デ
ータと、誤り訂正符号生成部9で生成された誤り訂正符
号を合成する符号化側合成部、11は受信品質評価部3か
らのエラー検知出力信号の指示に従って入力信号をバイ
パスする符号化側切換部である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of a digital radio telephone apparatus according to an embodiment of the present invention. In FIG. 1, 6 in the transmission means is an error correction code addition unit, and 8 in this error correction code addition unit 6 converts the voice coded data into important data (a part that greatly affects the sound quality) and non-important data (a sound quality that does not significantly affect the sound quality). An important data separation unit for separating the important data separated by the important data separation unit 8 is an error correction code generation unit for generating an error correction code having a length equal to that of the non-important data. Is a coding side synthesis unit that synthesizes the important data with the error correction code generated by the error correction code generation unit 9, and 11 is a code that bypasses the input signal according to the instruction of the error detection output signal from the reception quality evaluation unit 3. It is a liquefaction side switching part.

【0013】また、受信手段における7は誤り訂正部で
あり、この誤り訂正部7における12は受信データから誤
り訂正符号と音声データを分離する誤り訂正符号分離
部、13は誤り訂正符号分離部12から分離された誤り訂正
符号と音声データに基づき誤り訂正を行う誤り訂正実施
部、14は一様な乱数を発生する乱数発生部、15は誤り訂
正実施部13から出力される誤り訂正済みデータと、乱数
発生部14から出力される乱数信号を合成する復号化側合
成部、16は受信品質評価部3からのエラー検知出力信号
の指示に従って入力信号をバイパスする復号化側切換部
である。
Further, 7 in the receiving means is an error correction section, 12 in this error correction section 7 is an error correction code separation section for separating error correction code and voice data from the received data, and 13 is an error correction code separation section 12. An error correction implementation unit that performs error correction based on the error correction code and the voice data separated from, 14 is a random number generation unit that generates uniform random numbers, and 15 is the error corrected data output from the error correction implementation unit 13. A decoding-side combining unit that combines the random number signals output from the random number generation unit 14 and a decoding-side switching unit 16 that bypasses the input signal in accordance with the instruction of the error detection output signal from the reception quality evaluation unit 3.

【0014】なお、送信側無線部1,受信側無線部2,
受信品質評価部3,音声復号化部4および音声符号化部
5は、図3に示す従来と同様であり、受信品質評価部3
のエラー検知出力信号は符号化側切換部11と復号化側切
換部16に入力されている。
The transmitting side radio section 1, the receiving side radio section 2,
The reception quality evaluation unit 3, the voice decoding unit 4, and the voice encoding unit 5 are the same as the conventional one shown in FIG.
The error detection output signal of is input to the encoding side switching unit 11 and the decoding side switching unit 16.

【0015】以上のように構成されたディジタル無線電
話装置について、以下その動作を説明する。
The operation of the digital radiotelephone device configured as described above will be described below.

【0016】ディジタル無線電話装置は、既に無線電話
サービス網に接続され、通話状態にあるとする。
It is assumed that the digital radio telephone device is already connected to the radio telephone service network and is in a call state.

【0017】まず、ディジタル無線電話装置から音声を
送信する場合の説明を行う。通話相手(無線基地局を含
む)の音声は、無線電話サービス網から受信側無線部2
により受信され、受信品質評価部3に入力される。この
受信信号品質と通話相手側の受信信号品質には大きな相
関があり、受信品質評価部3からエラー検知出力信号S
0が出力されている場合は、相手側が受信する受信品質
も悪いと推定できる。受信データ品質が良好の場合には
エラー検知出力信号S0は出力されず、誤り訂正符号付
加部6では符号化側切換部11により入力信号がバイパス
され、マイクロホンMicからの音声は送信側無線部1へ
出力される。一方、受信データ品質が悪い場合は、エラ
ー検知出力信号S0が出力され、符号化側切換部11によ
り入力信号はバイパスされず、誤り訂正符号付加部6で
誤り訂正符号が付加される。
First, the case of transmitting voice from the digital wireless telephone device will be described. The voice of the other party (including the wireless base station) is transmitted from the wireless telephone service network to the receiving side wireless unit 2
And is input to the reception quality evaluation unit 3. There is a large correlation between the received signal quality and the received signal quality of the other party, and the error detection output signal S
When 0 is output, it can be estimated that the reception quality received by the other party is also poor. If the received data quality is good, the error detection output signal S0 is not output, the input signal is bypassed by the encoding side switching unit 11 in the error correction code adding unit 6, and the voice from the microphone Mic is transmitted by the transmission side wireless unit 1. Is output to. On the other hand, if the received data quality is poor, the error detection output signal S0 is output, the input signal is not bypassed by the encoding side switching unit 11, and the error correction code adding unit 6 adds the error correction code.

【0018】すなわち、マイクロホンMicからの音声
は、音声符号化部5で符号化され、そのデータは重要デ
ータ分離部8に入力され、音質に重大な影響を及ぼす重
要データD1と、非重要データD2に分離される。重要デ
ータD1は誤り訂正符号生成部9へ入力され、誤り訂正
符号S1を生成する。ここで誤り訂正符号S1の長さ(ビ
ット数)を、非重要データD2の長さと等しいように生成
する。そして、非重要データD2は捨てられ、結果的に
音声符号化率は以前の1/2に低くなる。重要データD
1と対応する誤り訂正符号S1は符号化側合成部10により
合成される。つまり、非重要データD2の代わりに誤り
訂正符号S1を送信する。非重要データは音質に重大な
影響を与えないので、非重要データを伝送しなくても音
質に与える影響は小さい。非重要データと誤り訂正符号
の長さは等しいので、結果的に誤り訂正符号を含むデー
タの長さと、重要データと非重要データに分離する以前
の音声符号化データの長さは等しい。つまり、前記エラ
ー検知出力信号S0の有無に拘らず、誤り訂正符号付加
部6の出力のデータ・レートは変化しない。誤り訂正符
号付加部6の出力のデータは、送信側無線部1に入力さ
れ、無線データとして無線電話サービス網に送出され
る。
That is, the voice from the microphone Mic is encoded by the voice encoding unit 5, and the data is input to the important data separating unit 8, and the important data D1 and the non-important data D2 that have a significant influence on the sound quality. Is separated into The important data D1 is input to the error correction code generation unit 9 to generate the error correction code S1. Here, the length (the number of bits) of the error correction code S1 is generated so as to be equal to the length of the non-important data D2. Then, the non-important data D2 is discarded, and as a result, the voice coding rate is reduced to 1/2 of the former value. Important data D
The error correction code S1 corresponding to 1 is combined by the encoding side combining unit 10. That is, the error correction code S1 is transmitted instead of the non-important data D2. Since the non-important data does not significantly affect the sound quality, the impact on the sound quality is small even if the non-important data is not transmitted. Since the lengths of the non-important data and the error correction code are equal, the length of the data including the error correction code is eventually equal to the length of the voice coded data before the separation into the important data and the non-important data. That is, the data rate of the output of the error correction code adding section 6 does not change regardless of the presence or absence of the error detection output signal S0. The data output from the error correction code addition unit 6 is input to the transmission-side wireless unit 1 and sent to the wireless telephone service network as wireless data.

【0019】次に、ディジタル無線電話装置から音声を
受信する場合の説明を行う。無線電話サービス網からの
無線データは受信側無線部2により受信され、受信品質
評価部3に入力され、受信データ品質が良好の場合には
エラー検知出力信号S0は出力されず、復号化側切換部1
6で入力信号がバイパスされ、そのまま音声復号化部4
に入力されスピーカSPから音声を出力する。ところ
が、受信データ品質が悪い場合は、前記エラー検知出力
信号S0が出力され、誤り訂正部7で誤り訂正処理が行
われる。
Next, a case of receiving voice from the digital radio telephone device will be described. The wireless data from the wireless telephone service network is received by the receiving side wireless unit 2 and input to the receiving quality evaluation unit 3. When the received data quality is good, the error detection output signal S0 is not output and the decoding side switching is performed. Part 1
The input signal is bypassed at 6, and the voice decoding unit 4 is used as it is.
Is input to the speaker SP and outputs sound from the speaker SP. However, when the received data quality is poor, the error detection output signal S0 is output and the error correction unit 7 performs error correction processing.

【0020】すなわち、符号化側切換部11によりバイパ
スされずに、誤り訂正符号分離部12へ入力され、誤り訂
正符号S2と音声データ符号化データの内の重要データ
D3に分離される。この誤り訂正符号S2と音声データ符
号化データの内の重要データD3は誤り訂正実施部13に
より誤り訂正を行い、誤り訂正済みデータD4を出力す
る。この誤り訂正済みデータD4は重要データD3だけを
復元したことになる。残りの非重要データの復元のため
に、乱数発生部14により一様な乱数を発生し、非重要デ
ータを乱数データで代用して、より自然な音質とする。
That is, the data is not bypassed by the encoding side switching unit 11, is input to the error correction code separation unit 12, and is separated into the error correction code S2 and the important data D3 of the audio data encoded data. The error correction code S2 and the important data D3 of the voice data coded data are error-corrected by the error correction execution unit 13, and the error-corrected data D4 is output. This error-corrected data D4 means that only important data D3 has been restored. To recover the remaining non-important data, the random number generator 14 generates a uniform random number and substitutes the non-important data with the random number data to obtain a more natural sound quality.

【0021】これにより、プロトコルに誤り訂正の有無
を切り換える特別なメッセージやフレーム構成を用いる
ことなく、受信品質を評価することで、自動的に誤り訂
正符号の付加の有無を判定でき、プロトコルそのものに
影響を与えることなく容易に実現できる。さらにプロト
コルで上記機能を実現する場合、フレーム単位(通常、1
0ミリ秒位)での“誤り訂正の付加”切り換え遅れ時間は
避けられないが、受信品質を評価する方法であれば、フ
レーム単位に影響されずに、直ちに切り換え可能であ
り、誤りに対する対策が迅速にできる。
By this means, it is possible to automatically determine whether or not an error correction code is added by evaluating the reception quality without using a special message or frame structure for switching the presence or absence of error correction in the protocol, and the protocol itself can be determined. It can be easily realized without affecting. When implementing the above functions with a protocol, frame units (usually 1
The "addition of error correction" switching delay time (about 0 msec) is unavoidable, but if it is a method of evaluating the reception quality, it is possible to switch immediately without being affected by the frame unit, and there is a countermeasure against the error. Can be done quickly.

【0022】以上が自局と相手局(通話相手)とで同時に
エラー検知出力信号が出力された場合の説明であるが、
実際には、電波伝搬の特性の違い等によりエラー検知出
力信号が出力されるタイミングが微妙に異なる場合があ
る。
The above is the description in the case where the error detection output signal is simultaneously output from the own station and the partner station (call partner).
Actually, the timing at which the error detection output signal is output may be slightly different due to differences in the characteristics of radio wave propagation.

【0023】次に、送信側(自局または相手局)と受信側
(相手局または自局)で、受信品質評価に差異があった場
合について説明する。これは、受信データ品質が悪いと
判断する境界付近で発生する。まず、送信側で誤り訂正
符号を付加して受信側で誤り訂正を行わなかった場合、
受信側で誤り訂正符号がそのまま非重要データとして音
声復号化部で復号化されるが、乱数データが誤り訂正符
号に代わっただけで音質には大きな影響は与えない。逆
に、送信側で誤り訂正符号を付加せずに受信側で誤り訂
正を行った場合、受信側では非重要データを誤り訂正符
号と誤認識して訂正を行い、結果的に重要データが破壊
される危険性があり、重要な音質変化をもたらす。
Next, the transmitting side (own station or partner station) and the receiving side
A case where there is a difference in the reception quality evaluation at the partner station or the own station will be described. This occurs near the boundary where it is determined that the received data quality is poor. First, when the error correction code is added on the transmitting side and the error is not corrected on the receiving side,
On the receiving side, the error correction code is directly decoded as non-important data by the voice decoding unit, but the random number data is replaced by the error correction code, and the sound quality is not greatly affected. Conversely, if the receiving side performs error correction without adding the error correcting code, the receiving side erroneously recognizes the non-important data as the error correcting code and corrects it, resulting in destruction of the important data. There is a risk that the sound quality will be changed, resulting in significant sound quality changes.

【0024】送信側で誤り訂正符号を付加せずに、受信
側で誤り訂正を行った場合の上記問題点を解決するため
に、受信品質評価部内に送信側と受信側でエラー検知と
判定する閾値を独立に有し、常に送信側から先にエラー
検知出力信号を発生するようにしたのが本発明の別の実
施例である。
In order to solve the above-mentioned problems when the receiving side performs error correction without adding the error correction code on the transmitting side, it is determined in the receiving quality evaluation unit that the transmitting side and the receiving side have detected an error. It is another embodiment of the present invention that the threshold value is independently provided and the error detection output signal is always generated first from the transmitting side.

【0025】図1で受信品質評価部3内に送信側閾値と
受信側閾値を設け、エラー検知出力信号が独立して送信
部,受信部に出力されることが前記実施例と異なる。図
2は送信側閾値,受信側閾値の説明図である。
In FIG. 1, a transmission side threshold value and a reception side threshold value are provided in the reception quality evaluation section 3, and the error detection output signal is independently output to the transmission section and the reception section, which is different from the above embodiment. FIG. 2 is an explanatory diagram of the transmission side threshold and the reception side threshold.

【0026】基本動作は図1と同様であるので、異なる
部分を説明する。図2(a)において、横軸に時間,縦軸
に受信品質評価部で評価する受信品質(例えば、S/N)
として、受信品質が時間とともに徐々に悪くなって、そ
の後、時間とともに回復する場合の説明図である。ま
た、図2(b)はエラー検知出力信号の送信側,受信側の
状態図、図2(c)は誤り訂正の有無について送信側,受
信側について示してある。図2(a)の通り、送信側閾値
は受信側閾値よりも高く設定されている。受信品質が送
信側閾値より高い場合(ア)、送信側,受信側でエラー発
生はなく(b)、双方において誤り訂正は行(無)われない
(c)。次に、受信品質が送信側閾値と受信側閾値の間に
ある場合(イ)、送信側に対してのみエラー検知出力が出
力され(b)、送信側では誤り訂正符号を付加(有)する
(c)。しかし、受信側では誤り訂正を行(無)わないた
め、送信側で付加(有)された誤り訂正符号は音声復号化
部では音質に重大な影響を及ぼさないノイズとして再生
される。続いて、受信品質が受信側閾値以下の場合
(ウ)、送信側,受信側双方にエラー検知出力信号を出し
(b)、送信側で誤り訂正符号の付加(有)、受信側で誤り
訂正を行う(有)。受信品質が回復していく場合も、同様
な動作を行う。送信側閾値と受信側閾値を適切に設定す
ることにより、自局と相手局とで受信品質評価部の動作
タイミングが異なっても、常に送信側が受信側より先に
誤り訂正符号を付加することができる。このように、送
信側で誤り訂正符号を付加せずに受信側で誤り訂正を行
う事態を防止でき、受信品質の判定閾値近辺での音質向
上を行うことができる。
Since the basic operation is the same as that of FIG. 1, only different parts will be described. In FIG. 2A, the horizontal axis represents time, and the vertical axis represents reception quality evaluated by the reception quality evaluation unit (for example, S / N).
4 is an explanatory diagram of a case where the reception quality gradually deteriorates with time and then recovers with time. Further, FIG. 2B is a state diagram of the transmission side and the reception side of the error detection output signal, and FIG. 2C shows the presence or absence of error correction on the transmission side and the reception side. As shown in FIG. 2A, the transmission side threshold is set higher than the reception side threshold. If the reception quality is higher than the threshold of the transmission side (a), no error occurs on the transmission side and the reception side (b), and no error correction is performed on both sides.
(c). Next, when the reception quality is between the threshold value on the transmission side and the threshold value on the reception side (a), the error detection output is output only to the transmission side (b), and the error correction code is added (present) on the transmission side.
(c). However, since the receiving side does not perform error correction (absent), the error correcting code added (present) at the transmitting side is reproduced as noise that does not seriously affect the sound quality at the speech decoding unit. Next, if the reception quality is less than or equal to the reception side threshold
(C) Outputs error detection output signal to both transmitting side and receiving side
(b), an error correction code is added on the transmitting side (yes), and an error is corrected on the receiving side (yes). The same operation is performed when the reception quality is recovered. By properly setting the transmission side threshold value and the reception side threshold value, the transmission side can always add the error correction code before the reception side even if the operation timing of the reception quality evaluation unit differs between the own station and the partner station. it can. In this way, it is possible to prevent a situation in which the transmitting side does not add an error correction code and the receiving side performs error correction, and it is possible to improve the sound quality in the vicinity of the reception quality determination threshold value.

【0027】[0027]

【発明の効果】以上説明したように、本発明のディジタ
ル無線電話装置は、送信部に誤り訂正符号付加部、受信
部に誤り訂正部を有し、受信データ品質が悪化したとき
に自動的に誤り訂正符号を付加して良品質の通話を行う
ことができるものである。
As described above, the digital radiotelephone apparatus of the present invention has the error correction code addition unit in the transmission unit and the error correction unit in the reception unit, and automatically when the received data quality deteriorates. It is possible to make a good quality call by adding an error correction code.

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

【図1】本発明の一実施例におけるディジタル無線電話
装置の構成を示すブロック図である。
FIG. 1 is a block diagram showing a configuration of a digital wireless telephone device according to an embodiment of the present invention.

【図2】本発明の別の実施例における送信側閾値と受信
側閾値の関係等を示す図である。
FIG. 2 is a diagram showing a relationship between a threshold value on the transmission side and a threshold value on the reception side according to another embodiment of the present invention.

【図3】従来のディジタル無線電話装置の構成を示すブ
ロック図である。
FIG. 3 is a block diagram showing a configuration of a conventional digital wireless telephone device.

【符号の説明】[Explanation of symbols]

1…送信側無線部、 2…受信側無線部、 3…受信品
質評価部、 4…音声復号化部、 5…音声符号化部、
6…誤り訂正符号付加部、 7…誤り訂正部、8…重
要データ分離部、 9…誤り訂正符号生成部、 10…符
号化側合成部、11…符号化側切換部、 12…誤り訂正符
号分離部、 13…誤り訂正実施部、 14…乱数発生部、
15…復号化側合成部、 16…復号化側切換部。
1 ... Transmission side radio section, 2 ... Reception side radio section, 3 ... Reception quality evaluation section, 4 ... Speech decoding section, 5 ... Speech coding section,
6 ... Error correction code addition unit, 7 ... Error correction unit, 8 ... Important data separation unit, 9 ... Error correction code generation unit, 10 ... Encoding side combining unit, 11 ... Encoding side switching unit, 12 ... Error correction code Separation unit, 13 ... Error correction execution unit, 14 ... Random number generation unit,
15 ... Decoding side combining section, 16 ... Decoding side switching section.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 受信データの品質が予め設定された値以
下の場合にエラー検知出力信号を出力する受信品質評価
手段と、受信データに対して前記エラー検知出力信号が
出力されている場合に誤り訂正を行う誤り訂正部および
前記誤り訂正部の出力を音声信号に復号化する音声復号
化部とを有する受信手段と、音声信号を符号化する音声
符号化部および前記エラー検知出力信号が出力されてい
る場合に誤り訂正符号を付加する誤り訂正符号付加部を
有する送信手段とを備え、受信データ品質が悪化したと
きに自動的に誤り訂正符号を付加して通話を行うことを
特徴とするディジタル無線電話装置。
1. A reception quality evaluation means for outputting an error detection output signal when the quality of the reception data is equal to or lower than a preset value, and an error occurs when the error detection output signal is output for the reception data. Receiving means having an error correction unit that performs correction and a voice decoding unit that decodes the output of the error correction unit into a voice signal, a voice encoding unit that encodes a voice signal, and the error detection output signal are output. And a transmission means having an error correction code addition unit for adding an error correction code when the received data quality deteriorates, and the error correction code is automatically added to make a call. Wireless telephone device.
【請求項2】 前記送信手段の誤り訂正符号付加部は、
前記音声符号化部の出力信号の一部を誤り訂正符号に置
き換えることを特徴とする請求項1記載のディジタル無
線電話装置。
2. The error correction code adding section of the transmitting means comprises:
2. The digital wireless telephone device according to claim 1, wherein a part of the output signal of the voice encoding unit is replaced with an error correction code.
【請求項3】 前記受信手段の誤り訂正部は、前記エラ
ー検知出力信号が出力されている場合に誤り訂正を行
い、誤り訂正符号に置き換えられた部分を乱数発生部か
らの乱数信号でさらに置き換えて出力することを特徴と
する請求項1記載のディジタル無線電話装置。
3. The error correction unit of the receiving means performs error correction when the error detection output signal is output, and further replaces the part replaced with the error correction code with the random number signal from the random number generation unit. The digital wireless telephone device according to claim 1, wherein the digital wireless telephone device is output.
【請求項4】 前記受信品質評価手段は、品質評価のた
めに受信手段用閾値と送信手段用閾値を有し、個別に送
信側エラー検知出力信号および受信側エラー検知出力信
号を出力し、送信手段に対する閾値を受信手段よりも高
めに設定することにより、受信手段で誤り訂正を行って
いるときに確実に送信手段で誤り訂正を行うことを特徴
とするディジタル無線電話装置。
4. The reception quality evaluation means has a reception means threshold value and a transmission means threshold value for quality evaluation, and individually outputs a transmission side error detection output signal and a reception side error detection output signal for transmission. A digital radiotelephone device characterized in that by setting a threshold for the means higher than that of the receiving means, the error correction is surely performed by the transmitting means when the receiving means is performing the error correction.
JP5216193A 1993-08-31 1993-08-31 Digital radio telephone set Pending JPH0774733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5216193A JPH0774733A (en) 1993-08-31 1993-08-31 Digital radio telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5216193A JPH0774733A (en) 1993-08-31 1993-08-31 Digital radio telephone set

Publications (1)

Publication Number Publication Date
JPH0774733A true JPH0774733A (en) 1995-03-17

Family

ID=16684744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5216193A Pending JPH0774733A (en) 1993-08-31 1993-08-31 Digital radio telephone set

Country Status (1)

Country Link
JP (1) JPH0774733A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007043524A (en) * 2005-08-04 2007-02-15 Hitachi Kokusai Electric Inc Communication station device
JP2009535965A (en) * 2006-05-03 2009-10-01 サムスン エレクトロニクス カンパニー リミテッド Method, apparatus, and transmission frame structure for transmitting / receiving uncompressed AV data

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007043524A (en) * 2005-08-04 2007-02-15 Hitachi Kokusai Electric Inc Communication station device
JP2009535965A (en) * 2006-05-03 2009-10-01 サムスン エレクトロニクス カンパニー リミテッド Method, apparatus, and transmission frame structure for transmitting / receiving uncompressed AV data
US8422549B2 (en) 2006-05-03 2013-04-16 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving uncompressed audio/video data and transmission frame structure

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