A Practical Analysis of Sum-and-Difference Matrixing for Stereo Broadcast Transmission Systems
With the imminent reality of multichannel television sound (MTS) braodcasting, there is an urgent need to resolve some of the concerns frequently posed by broadcast engineers with regard to: 1) the spatial qualities of the M/S miking technique, and 2) the practicality of implementing the sum-and-difference (rather than the discrete left/right) mode of transmitting the stereo program signals throughout the broadcast plant. This paper will demonstrate the effective channel separation realized in a real-world situation, by recording on a working television studio set a sound source at various angles about an M/S microphone array, logging and tabulating the signal levels for M (L + R) and S (L - R), and then plotting the resultant signal levels for L and R for each of the angular locations. The authors will then demonstrate that the potential for down-line degradation of the original stereo program is minimized by implementing the sum-and-difference transmission mode.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is temporarily free for AES members.