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POWERSHOTS230 Manual de Servicio
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CHAPTER 2. TECHNICAL DESCRIPTION
2.2.2 Picture Processing
1) The drive pulse of the CCD sensor is created by both clock from DSP and TG that is operated by sync. signal. The picture signal by the drive pulse is output from CCD sensor. The output signal of the CCD picture is converted to the signal processing and the digital data by the CDS and A/D converter, and is sent to the DSP. 2) The DSP circuit performs the following signal processing. � Processes the picture data (using the SDRAM). � Writes and reads the picture data to and from the CF card. � Outputs analog video signal to the LCD and VIDEO OUT. 3) The video signal that is supplied form the DSP is controlled by the LCD driver and is displayed on the LCD. 4) The video amplifier is activated when the video plug is inserted to the AV connector and drives the video signal in 75 �.
2.2.3 Audio Processing (During record and playback)
1) During animation recording. � The microphone audio signal is converted to the digital data by CPU and is recorded. 2) During playback, the data is converted back to the analog audio signal and is output to the AV connector.
