LG VX8560 Service Manual page 47

VX8560
2.3.7 DSP (Multimedia processor) Part
DSP is a high performance multimedia application processor based on the ARM926EJ-S,ARM Ltd's proprietary 32-
bit RISC CPU core. DSP provides imaging, video, audio functions instead of QSC6075. It decode and encode
(M)JPEG, MPEG4/H.263, MP3 or other types of audio/voice/video/image compression/decompression standards.
LCD
In the bypass mode, QSC has complete control over all LCD operations, excluding camera processing function. In
other words, it indicates when LCD is initialized and GUI of system is displayed on the LCD.
CAMERA
DSP provides clock to operate sensor and controls internal register of sensor through the I2C master embedded in
DSP to make sensor operate normally. After completion of internal register setting, sensor supplies YUV422 image
data, synchronous signal and pixel clock synchronized with pixel of image data to DSP. VSYNC is a synchronized
signal to differentiate frames and HREF is a synchronized signal to differentiate lines. These signals are synchronized
with the pixel clock. Input image data through the sensor interface is previewed on the LCD up to 30fps through the
IMAGE ENHANCER.
EXTERNAL CODEC
Normally codec bypass signal from QSC6075 to Speaker, Headset. However, when we listen to the music in "My
Music" folder codec performs 3-D sound enhancement and automatic level control for microphone or line input. The
on-chip ADC and DAC are of a high quality using a multi-bit, low-order oversampling architecture to deliver
optimum performance with low power consumption. It supports I2S audio data format between DSP and codec. A
speaker amplifier, using digital amplifier system, realizes low power consumption than that of linear amplifier. In
addition, power-down mode is available to minimize the current consumption when used.
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