Speech Recogniton

Someone please tell the best technique for speech processing besides HMM. I have implemented it using auto correlation of the sampled signal but the sucess is limited to only 60%. Besides i have an idea to use Spectrogram. Will it work? And if yes then hw should i implement it??

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29574-automatic-detection-of-melanoma