The mosquito noise reduction detects and removes mosquito noise, a common compression artifact caused by video compression standards, such as MPEG-2, due to on compression factors and coding efficiency. Since these compression techniques are not lossless, the video reconstructed by the decoder for display on a DTV screen has some artifacts due to the loss of information in the video stream. One such artifact is called mosquito noise.
Silicon Image’s mosquito noise reduction IP core can be used for many applications to improve the quality of video or still images. As part of a video SoC for consumer electronic applications such as set-top boxes, the IP core’s algorithms enhance the quality of video streams, especially those encoded with lower bit rates. In this case, the IP core will be placed in the digital video processing chain behind a video decoder (such as Silicon Image’s H.264/MPEG-2/VC-1 cineramIC video decoder IP core) or as part of a video output unit which sends the video content to the display.
In SoCs for DTVs or computer displays, the mosquito noise reduction IP core will improve any incoming video and still image with mosquito noise. The core can also be integrated into SoCs for smart cables to increase image quality sent from a source to a DTV where both devices do not offer this capability. Since the IP core is a hardwired solution requiring only low power, the core is very suitable for mobile devices too.
Mosquito noise can be present in both SD and HD resolution video, but is much more noticeable in SD video because of the lower pixel density and a larger pixel size. Mosquito noise is often exhibited as a cloud around the edges of text and computer generated graphics.
Silicon Image’s mosquito noise algorithms detect areas where mosquito noise would most likely be and then processes these areas to diminish the mosquito noise without blurring the edge of the text or graphics. The mosquito noise reduction IP core works for both SD and HD video sources. The core includes also optimized fine detail and edge enhancement functionality to further improve the image quality of the video sent to the DTV screen.
- Verilog source code, Verification environment, synthesis scripts, Documentation in PDF format
Block Diagram of the Mosquito Noise Reduction IP Core