why do i got negative infinite (- inf) in SNR?

hi, i want to calculate snr value from 2 signal. one of them is speech.wav and the second one is speechcompressed. to make sure there is no delay,i use cross correlation for them. the snr result that i got is infinite, could u help me please?

[audio1,fs]=audioread('speech.wav');

[audio_compressed,fs]=audioread('speechcompressed.wav');

total_frame = round(length(audio1)/1024);

snr_frame_db = zeros(1,total_frame);

for k=1:total_frame-1

sample_start = k*1024-1023;

sample_end = k*1024;

signal_frame = audio_compressed(sample_start:sample_end);

error_frame = audio1(sample_start:sample_end)-signal_frame;

power_signal = sum(signal_frame.*signal_frame);

power_error = sum(error_frame.*error_frame);

snr_frame = power_signal/power_error;

snr_frame_db(k) = 10*log10(snr_frame);

end

mean(snr_frame_db)