High-definition video broadcasting and storage requires a new generation of optical disc formats. While the principles of optical drive remain the same, the supported video and audio formats provided with the Blu-ray standard and the next-generation user interface and memory require some design updates. This article will discuss this.
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Design considerations
High-definition video broadcasting and storage requires a new generation of optical disc formats, known as Blu-ray Disc (BD) Blu-ray . While the principles of optical drive remain the same, the supported video and audio formats provided with the Blu-ray standard and the next-generation user interface and memory require some design updates.
In terms of video, the standard supports MPEG-2, MPEG-4 AVC (H.26?) and SMPTE VC-1 (based on WMV); this generation of players must be output in HDMI format.
Forced audio standard LPCM, Dolby Digital (DD) and DTS digital surround sound, as well as a variety of optional formats require up to 8 channels of audio for home theater effects.
The kernel subsystem includes:
DSP/ASSP – Performs MPEG decoding, audio processing, control system electronics, CD drive and user interface. With the ability to integrate multiple functions, a discrete solution on the audio and video side may be required.
Audio – Provides audio output in different formats, allowing audio signals to be digitized by the audio converter and processed by the DSP to provide high quality audio.
Video – Provides video output in different formats: NTSC/PAL, S-video and YPrPb component video and HDMI. The input stage requires a high performance op amp to amplify the video signal.
Memory – Stores execution code and data/parameters.
User Interface – Allows the user to control the player or home theater using the panel keyboard, remote control or touch screen controls.
Power Conversion - Converts the input power to the AC adapter to run various function blocks.
HD Blu-ray player and home theater block diagram
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