The ornamental design for a televisionreceiver, as shown and described.
1. Television receiver
1.1 : Front Top Perspective, shown with the display in a fully retracted position
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Top
1.6 : Bottom
1.7 : Back Top Perspective
1.8 : Front Bottom Perspective, shown in an example of use with detachable storage
1.9 : Front Top Perspective 2, shown with cover opened and display in a partially extended transitional position
1.10 : Front Top Perspective 3, shown with the display in a fully extended position
1.11 : Front 2
1.12 : Back 2
1.13 : Left 2
1.14 : Top 2
1.15 : Bottom 2
1.16 : Back Top Perspective 2
1.17 : Front Top Perspective 4, shown with display in a partially retracted transitional position
1.18 : Front Top Perspective 5, shown with display in a partially retracted transitional position
The broken lines depict portions of the television receiver that form no part of the claimed design; the right views are omitted because they are mirror images of the left views.