1. Source and resolution
A high-resolution label is useful only if the source contains that level of detail. An old or heavily compressed source can look soft even when output at a higher resolution. Different channels may have different production quality and encoding settings.
2. Bitrate and compression
Bitrate is the amount of data used to represent video over time. When the bitrate is low for the amount of visual detail and motion, compression artefacts such as blocks, smearing, and loss of fine texture may appear. A larger bitrate alone does not guarantee a better source, but it can allow more detail to be preserved when other factors are comparable.
3. Delivery stability
The connection must deliver data consistently enough for the player. Congestion, packet loss, weak Wi-Fi, and overloaded network equipment can cause buffering or interruptions. These problems do not necessarily make a stable, fixed-quality stream intrinsically lower resolution, although adaptive players may reduce quality to keep playback running.
4. Device and display
The player must support the stream’s codec and format. Device performance, app implementation, HDMI path, TV scaling, sharpness processing, and picture mode can affect the result. A TV set to an unusual zoom or overscan mode may also crop the image.
A practical test
Compare the same programme on the same screen at the same time, changing only one variable. Then compare a different source. This helps separate a source-quality problem from a network or device problem.
FAQ
Is bitrate more important than resolution? Neither tells the full story alone. They describe different aspects of the video, and source quality and compression matter too.
Can my TV improve a poor stream? Processing may make the picture appear smoother or sharper, but it cannot fully restore missing source detail.
QA: Keep the article explanatory rather than turning it into the step-by-step fix guide in article 88.