“1080 interlaced” refers to a video display format that has a resolution of 1920×1080 pixels and uses an interlaced scanning method. The term is commonly used to describe high-definition television (HDTV) content and display devices that use this format.
Key points about 1080 interlaced include:
- Resolution: “1080” refers to the vertical resolution, which is 1080 pixels. The horizontal resolution is 1920 pixels. This results in a display aspect ratio of 16:9, commonly used for widescreen displays.
- Interlaced Scanning: In interlaced scanning, the display alternates between drawing even and odd lines of the image in two separate fields. This creates a full frame by combining two fields. The process is rapid enough that the human eye perceives a complete image, but it can result in motion artifacts and reduced image quality, especially during fast-moving scenes.
- 1080i vs. 1080p: “1080i” stands for 1080 interlaced, while “1080p” stands for 1080 progressive. In progressive scanning (1080p), each frame is drawn sequentially, resulting in smoother motion and generally better image quality compared to interlaced scanning.
- Television Broadcasting: Some HDTV broadcasts and content were originally delivered in the 1080i format, particularly during the transition from standard definition to high definition.
- Display Devices: Some older HDTV sets, monitors, and projectors supported the 1080i format. However, as technology evolved, progressive scanning (1080p) became more prevalent due to its superior image quality.
- Motion Artifacts: Interlaced content can exhibit “interlacing artifacts” during fast motion, where fine details may appear jagged or distorted. These artifacts are less noticeable in progressive scanning.
- Deprecated Format: As of my last knowledge update in September 2021, 1080 interlaced is becoming less common due to the preference for progressive scanning and higher resolutions such as 4K (2160p) and 8K (4320p).
In summary, “1080 interlaced” describes a video display format with a resolution of 1920×1080 pixels that uses an interlaced scanning method. While it was a significant step up from standard definition formats, interlaced scanning has limitations in terms of motion quality and visual artifacts compared to the progressively scanned 1080p and higher-resolution formats.