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Pixel to Byte Packing

Table of Contents

  1. Definition
  2. How it Works
  3. Features
  4. Benefits
  5. Enabling Technologies
  6. Rambus Technologies

What is Pixel to Byte Packing?

Pixel to Byte Packing is a data formatting technique used in digital imaging and display systems to convert pixel data, typically represented in color components like RGB or YUV, into a compact byte-oriented format suitable for memory storage or transmission. This process is essential for optimizing bandwidth, memory usage, and processing efficiency in graphics pipelines, image sensors, and display interfaces.

How Pixel to Byte Packing Works

Each pixel in an image consists of one or more color components (e.g., Red, Green, Blue). Depending on the bit depth (e.g., 8-bit, 10-bit, 12-bit), these components are packed into bytes using specific alignment rules. For example:

  • 8-bit RGB888 format: Each pixel uses 3 bytes (1 byte per color channel).
  • 10-bit YUV422 format: Multiple pixels are packed into 5 bytes to optimize space.
  • Sub-byte packing: For formats like RGB565 (5 bits for red, 6 for green, 5 for blue), pixels are packed into 2 bytes.
 

Packing schemes must consider alignment, endianness, and padding to ensure compatibility with memory systems and display protocols.

What are the key features of Parity Protection?

  • Supports various pixel formats (RGB, YUV, grayscale)
  • Handles different bit depths (8-bit, 10-bit, 12-bit, etc.)
  • Aligns data for efficient memory access
  • Enables compression and decompression workflows
  • Critical for embedded systems, mobile devices, and display panels
 

What are the benefits of Parity Protection?

  • Efficient Memory Usage: Reduces the amount of memory required to store image data.
  • Optimized Bandwidth: Minimizes data size for faster transmission over interfaces like MIPI DSI or HDMI.
  • Improved Performance: Enables faster image processing and rendering by aligning data with hardware expectations.
  • Compatibility: Ensures proper interfacing with display controllers, GPUs, and image processors.
 

Enabling Technologies

Pixel to byte packing is integral to:

  • Image signal processors (ISPs)
  • Graphics processing units (GPUs)
  • Display interfaces like MIPI DSI, HDMI, and DisplayPort
  • Video encoders/decoders
  • Embedded systems and mobile devices
 

Rambus Technologies

Rambus offers MIPI DSI-2 and CSI-2 Controller Cores that are fully compliant with each standard and implements all three layers, including Pixel to Byte Packing. To learn more about our MIPI Controller IP solutions, click here.

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