Overview
1-1 Features
The
The
1) HDCAM is a trademark of Sony Corporation.
The
The technology incorporated in this unit includes the following.
•Highly efficient and mild data compression using newly developed
•Powerful
•
recording and playback.
These technologies allow 120 minutes of recording on an
Digital signal processing
In this unit, 4:2:2 component video signals obtained by quantization according to
Chapter 1
Input interface
The input interface is based on the HD SDI (HD Serial Digital Interface) format specified by BTA
Audio recording can be switched between the digital audio signal multiplexed with the HD SDI signal and the audio signal from an AES/EBU digital interface.
Bit rate reduction encoder
The component video signal undergoes frame shuffling. It is then compressed by a process in which it is subjected to DCT (discrete cosine transform) or DPCM (differential pulse code modulation), quantization control, and variable length word encoding. This is the core of the newly developed
ECC encoder
The outer ECC (Error Correction Code) is added to the compressed video and audio data, followed by the inner ECC, ID data, and sync data.
Channel coding
Video and audio data with the ECC added is recorded in the form of serial data. The
Playback signal processing
The playback digital signal is equalized by an equalizer circuit. It then passes powerful inner and outer ECCs which can correct dropouts in the reproduced signal. It further goes through an error concealment circuit to have errors still remaining in the signal rectified.
Output interface
Component video data is converted into serial data and multiplexed with audio data and time code, then output in the HD SDI format.
Overview 1 Chapter
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