The ornamental design for a televisionreceiver, as shown and described.
1. Television receiver
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Right
1.6 : Top
1.7 : Bottom
1.8 : Perspective
1.9 : Front
1.10 : Back
1.11 : Left
1.12 : Right
1.13 : Top
1.14 : Bottom
Figures 1.1-1.14 show one (1) design. The subject design is characterized by a rollable display. Figures 1.1-1.7 show the unused state of the subject design with the display unit rolled and unexposed. Figures 1.8-1.14 show the use state of the subject design with the display unit fully exposed.