Compression can create ringing or mosquito-like noise near sharp edges, especially around text and high-contrast graphics. Excessive sharpening may make it more visible. Compare the same source with restrained enhancement before deciding whether the artefact comes from the encoded picture or local processing.
Use the edge as a reference
A scoreboard against a flat background is a useful test because the noise is easier to see beside a strong boundary. Watch whether the specks change with movement and whether the main letters remain stable. Do not confuse this with a whole-screen sparkly signal fault, which may need a different connection check.
Try modest cleanup only
A documented compression-noise control may reduce visibility, but strong filtering can soften lettering and faces. Lowering excessive sharpness is a sensible first comparison. Keep the original settings so the result can be reversed, and assess ordinary footage as well as the troublesome graphic.
Locate the source of the effect
If the same pattern appears in another supported player or display, source encoding becomes a stronger explanation. If it appears across every input only on one television, inspect its processing. Report the programme and time rather than describing all small text as a network-speed problem, because stable encoded edge noise is not the same as waiting for data.
