Multi-portion radio transmissions
Techniques are disclosed relating to generating and receiving radio frames with multiple portions that have different encoding schemes. An apparatus may include one or more processing elements configured to receive, via a wireless radio, wireless data that includes a plurality of portions that each include multiple orthogonal frequency-division multiplexing (OFDM) symbols. Different ones of the portions have different frequency transform sizes and different sampling rates. The wireless data may also include control data that indicates the frequency transform sizes and sampling rates for the ones of the portions. The apparatus may select, based on the control data and a determined velocity of the apparatus, one or more but not all of the plurality of portions and may decode the selected one or more portions to determine data represented by the OFDM symbols in the selected one or more portions. Different portions of the wireless data may be adapted for decoding by devices moving at different maximum velocities.
1. An apparatus, comprising:
one or more processing elements configured to:
receive, via a wireless radio, a transport frame of broadcast wireless data that includes:
a plurality of portions, wherein different ones of the portions encode different types of video content; and
control data that indicates the types of video content encoded by the ones of the portions;
select, based on the control data and whether the apparatus is a fixed or mobile device, one or more of the plurality of portions; and
decode the selected one or more portions to determine data represented by symbols in the selected one or more portions.
2. The apparatus of claim 1 , wherein one or more of the portions of the transport frame are time division multiplexed.
3. The apparatus of claim 1 , wherein one or more of the types of video content encoded by the ones of the portions have different video quality levels.
4. The apparatus of claim 1 , wherein one or more of the types of video content encoded by the ones of the portions include different programming content.
5. The apparatus of claim 1 , wherein one or more of the types of video content encoded by the ones of the portions use different video encoding techniques.
6. The apparatus of claim 1 , wherein one or more of one or more of the portions of the transport frame have different frequency transform sizes.
7. The apparatus of claim 1 , wherein the control data is specified at the transport layer.
8. The apparatus of claim 1 , wherein the apparatus is configured to determine whether it is a fixed or mobile device based on current operating conditions of the apparatus.
9. A method, comprising:
receiving or generating, by a computing system:
data for a transport frame for wireless broadcast transmission, wherein the data includes:
a plurality of portions, wherein different ones of the portions encode different types of video content; and
control data that indicates the types of video content encoded by the ones of the portions; and
causing, by the computing system, the transport frame to be wirelessly broadcast.
10. The method of claim 9 , wherein one or more of the portions of the transport frame are time division multiplexed.
11. The method of claim 9 , wherein one or more of the types of video content encoded by the ones of the portions have different video quality levels.
12. The method of claim 9 , wherein one or more of the types of video content encoded by the ones of the portions use different video encoding techniques.
13. The method of claim 9 , wherein one or more of one or more of the portions of the transport frame have different frequency transform sizes that target fixed and mobile receivers, respectively.
14. The method of claim 9 , wherein the control data is specified at the transport layer.
15. A non-transitory computer-readable medium having instructions stored thereon that are executable by an electronic device to perform operations comprising:
receiving, via a wireless radio, a transport frame of broadcast wireless data that includes:
a plurality of portions, wherein different ones of the portions encode different types of video content; and
control data that indicates the types of video content encoded by the ones of the portions;
selecting, based on the control data and whether the electronic device is a fixed or mobile device, one or more of the plurality of portions; and
decoding the selected one or more portions to determine data represented by symbols in the selected one or more portions.
16. The non-transitory computer-readable medium of claim 15 , wherein one or more of the types of video content encoded by the ones of the portions have different video quality levels.
17. The non-transitory computer-readable medium of claim 15 , wherein one or more of the types of video content encoded by the ones of the portions include different programming content.
18. The non-transitory computer-readable medium of claim 15 , wherein one or more of the types of video content encoded by the ones of the portions use different video encoding techniques.
19. The non-transitory computer-readable medium of claim 15 , wherein one or more of the portions of the transport frame have different frequency transform sizes.