JPH0316742U - - Google Patents
Info
- Publication number
- JPH0316742U JPH0316742U JP7852389U JP7852389U JPH0316742U JP H0316742 U JPH0316742 U JP H0316742U JP 7852389 U JP7852389 U JP 7852389U JP 7852389 U JP7852389 U JP 7852389U JP H0316742 U JPH0316742 U JP H0316742U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- average value
- coincidence detection
- exponential average
- shift register
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 238000009499 grossing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 2
Landscapes
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Description
第１図はこの考案の一実施例による適応形デル
タ変調符号化復号化装置を示すブロツク図、第２
図及び第３図はこの考案の他の実施例による適応
形デルタ変調符号化復号化装置の要部を示すブロ
ツク図、第４図は従来の定差デルタ変調符号化復
号化装置を示すブロツク図、第５図は同装置の動
作を説明するための各部の出力波形図である。
６……コンパレータ、１０……積分器、１１…
…シフトレジスタ、１２……一致検出回路、Ａ…
…平滑化回路、Ｂ……電流制御回路である。なお
、図中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a block diagram showing an adaptive delta modulation encoding/decoding device according to an embodiment of the invention, and FIG.
3 and 3 are block diagrams showing the main parts of an adaptive delta modulation coding/decoding device according to another embodiment of this invention, and FIG. 4 is a block diagram showing a conventional differential delta modulation coding/decoding device. , FIG. 5 is an output waveform diagram of each part for explaining the operation of the device. 6... Comparator, 10... Integrator, 11...
...Shift register, 12...Coincidence detection circuit, A...
...Smoothing circuit, B... Current control circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
パレータと、上記コンパレータの出力信号又はデ
イジタル入力信号が供給されると共にデイジタル
出力信号を得るシフトレジスタと、上記シフトレ
ジスタの初段の出力信号の指数平均値を求める平
滑化回路と、上記シフトレジスタの全段の内容が
一致するか否かを検出する一致検出回路と、上記
一致検出回路の一致検出信号に基づいて上記平滑
化回路で求められた上記指数平均値を示す信号を
α倍して得られる電流を出力し、上記一致検出回
路の不一致検出信号に基づいて上記指数平均値を
示す信号を１／α倍して得られる電流を出力する
電流制御回路と、上記電流制御回路の出力電流を
積分して上記帰還信号又はアナログ出力信号を得
る積分器とを備えた適応形デルタ変調符号化復号
化装置。 A comparator that compares an analog input signal and a feedback signal, a shift register to which the output signal of the comparator or the digital input signal is supplied and obtains a digital output signal, and an exponential average value of the output signal of the first stage of the shift register. a smoothing circuit, a coincidence detection circuit that detects whether the contents of all stages of the shift register match, and the exponential average value obtained by the smoothing circuit based on the coincidence detection signal of the coincidence detection circuit. a current control circuit that outputs a current obtained by multiplying a signal indicating the exponential average value by α by α, and outputs a current obtained by multiplying the signal indicating the exponential average value by 1/α based on the mismatch detection signal of the coincidence detection circuit; , an integrator that integrates the output current of the current control circuit to obtain the feedback signal or analog output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7852389U JPH0316742U (en) | 1989-07-03 | 1989-07-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7852389U JPH0316742U (en) | 1989-07-03 | 1989-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0316742U true JPH0316742U (en) | 1991-02-19 |
Family
ID=31621872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7852389U Pending JPH0316742U (en) | 1989-07-03 | 1989-07-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0316742U (en) |
-
1989
- 1989-07-03 JP JP7852389U patent/JPH0316742U/ja active Pending
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