US 9,812,144 B2
Speech transcoding in packet networks
Olli Sakari Kirla, Espoo (FI); and Antti Pekka Einari Kurittu, Vantaa (FI)
Assigned to NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
Appl. No. 14/786,779
Filed by NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
PCT Filed Apr. 25, 2013, PCT No. PCT/EP2013/058573
§ 371(c)(1), (2) Date Oct. 23, 2015,
PCT Pub. No. WO2014/173446, PCT Pub. Date Oct. 30, 2014.
Prior Publication US 2016/0078876 A1, Mar. 17, 2016
Int. Cl. G10L 19/005 (2013.01); G10L 19/012 (2013.01); G10L 19/16 (2013.01); H04L 12/841 (2013.01); H04L 12/825 (2013.01); H04W 88/18 (2009.01)
CPC G10L 19/173 (2013.01) [G10L 19/012 (2013.01); G10L 19/167 (2013.01); H04L 47/26 (2013.01); H04L 47/283 (2013.01); G10L 19/005 (2013.01); H04W 88/181 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving a packet at a packet loss detector of a transcoder;
omitting jitter buffering before decoding in the transcoder and omitting bad frame handling in a decoding stage of the transcoder;
decoding the packet into a decoded packet;
encoding the decoded packet into a re-encoded packet;
transmitting the re-encoded packet from the transcoder;
monitoring for a received packet;
freezing a decoder and an encoder of the transcoder when a packet is not received;
sending packet loss information from the decoder to the encoder when a packet loss is detected; and
setting an outgoing packet stream to permit detection of missing packets by a downstream decoder upon receiving a valid packet after the packet is not received.