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參數(shù)資料
| 型號： | CXD3009Q |
| 廠商： | Sony Corporation |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | CD Digital Signal Processor(CD數(shù)字信號處理器) |
| 中文描述： | CD數(shù)字信號處理器（光盤數(shù)字信號處理器） |
| 文件頁數(shù)： | 43/64頁 |
| 文件大小： | 477K |
| 代理商： | CXD3009Q |
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CXD3009Q
4-2. Frame Sync Protection
In normal-speed playback, a frame sync is recorded approximately every 136μs (7.35kHz). This signal is
used as a reference to recognize the data within a frame. Conversely, if the frame sync cannot be
recognized, the data is processed as error data because the data cannot be recognized. As a result,
recognizing the frame sync properly is extremely important for improving playability.
In the CXD3009Q, window protection and forward protection/backward protection have been adopted for
frame sync protection. These functions achieve very powerful frame sync protection. There are two window
widths: one for cases where a rotational disturbance affects the player and the other for cases where there
is no rotational disturbance (WSEL = 0/1). In addition, the forward protection counter is fixed to 13, and the
backward protection counter to 3. Concretely, when the frame sync is being played back normally and then
cannot be detected due to scratches, a maximum of 13 frames are inserted. If the frame sync cannot be
detected for 13 frames or more, the window opens to resynchronize the frame sync.
In addition, immediately after the window opens and the resynchronization is executed, if a proper frame
sync cannot be detected within 3 frames, the window opens immediately.
4-3. Error Correction
In the CD format, one 8-bit data contains two error correction codes, C1 and C2. For C1 correction, the
code is created with 28-byte information and 4-byte C1 parity.
For C2 correction, the code is created with 24-byte information and 4-byte parity.
Both C1 and C2 are Reed Solomon codes with a minimum distance of 5.
The CXD3009Q's SEC strategy uses powerful frame sync protection and C1 and C2 error correction to
achieve high playability.
The correction status can be monitored externally.
See Table 4-1.
When the C2 pointer is high, the data in question was uncorrectable. Either the pre-value was held or an
average value interpolation was made for the data.
MNT3
0
0
0
1
1
1
MNT1
0
0
1
0
0
1
MNT0
0
1
1
0
1
1
Description
No C1 errors
One C1 error corrected
C1 correction impossible
No C2 errors
One C2 error corrected
C2 correction impossible
Table 4-1.
相關(guān)PDF資料 |
PDF描述 |
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| CXD3011R-1 | Hook-Up Wire; Conductor Size AWG:26; No. Strands x Strand Size:7 x 34; Jacket Color:White/Yellow; Cable/Wire MIL SPEC:MIL-W-16878/1 Type B; Conductor Material:Copper; Jacket Material:Polyvinylchloride (PVC) RoHS Compliant: Yes |
| CXD3017Q | CD Digital Signal Processor with Built-in Digital Servo and DAC(CD數(shù)字信號處理器（內(nèi)置數(shù)字伺服系統(tǒng)和 D/A轉(zhuǎn)換器）) |
| CXD3027R | CD Digital Signal Processor with Built-in Digital Servo +Shock-Proof Memory Controller + Digital High & Bass Boost(CD數(shù)字信號處理器(內(nèi)置數(shù)字伺服系統(tǒng)、防震存儲器控制器、數(shù)字式高&低音提升電路）) |
| cxd3027 | CD Audio Digital Signal-Processing LSI Device with On-Chip Digital Servo System Allows Listening without Sound Skipping |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CXD3011R-1 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD3017Q | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD3018Q/R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CD Digital Signal Processor with Built-in DigitalServo and DAC |
| CXD3021 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD3021R | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
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