Multi-channel signal decoder

In apparatus for providing an output control signal by decoding an information signal containing multiple message frequencies, the apparatus comprising:

• means for filtering first and second message frequencies from said message signal;
• means for decoding each of said first and econd message frequencies, with one filtering means being operative with one decoding means in relation to each of said first and second message frequencies;
• and
• means for comparing said decoded first and second message frequencies for providing said output control signal when said first and second message frequencies have a predetermined relationship.

Apparatus for decoding information stored as a plurality of message frequencies which comprise a message signal, said apparatus comprising:

• first filter means for filtering a first message frequency from said message signal;
• second filter means for filtering a second message frequency from said message signal where said second message frequency is complementary to said first message frequency;
• first detector means for detecting first message units in exclusive response to said first message frequency filtered by said first filter means;
• second detector means for detecting second message units in exclusive response to said second message frequency filtered by said second filter means, where said second message units are complementary to said first message units of said first detector means;
• first storage means for storing said first message units of said first detector means;
• second storage means for storing said second message units of said second detector means;
• means for decoding a first command signal in relation to said first message units stored in said first storage means;
• means for decoding a second command signal in complementary relation to said second message units stored in said second storage means;
• and
• means for comparing said first command signal with said second command signal for providing an output signal when said first command signal has a predetermined relationship to said second command signal.

In a vehicle control system, apparatus for providing, in relation to a plurality of message frequencies which comprise a message signal, a speed error signal to vehicle traction equipment having first and second feedback signals, said apparatus comprising:

• first filter means for filtering a first message frequency from said message signal;
• second filter means for filtering a second message frequency from said message signal, where said second message frequency is complementary to said first message frequency;
• first detector means for detecting first message units in response to said first message frequency filtered by said first filter means;
• second detector means for detecting second message units in exclusive response to said second message frequency filtered by said second filter means, where said second message units are complementary to said first message units of said first detector means;
• first storage means for storing said first message units of said first detector means;
• second storage means for storing said second message units of said second detector means;
• first decoder means for decoding a first command signal in relation to said first message units stored in said first storage means;
• second decoder means for decoding a second command signal in complementary relation to said second message units stored in said second storage means;
• and
• means for providing said speed error signal to said traction equipment in relation to a predetermined comparison between said first and second command signals.

In a vehicle control system apparatus for providing, in relation to a plurality of message frequencies which comprise a message signal, a speed error signal to vehicle traction equipment having first and second feedback signals, said apparatus comprising:

• first filter means for filtering a first message frequency from said message signal;
• second filter means for filtering a second message frequency from said message signal, where said second message frequency is complementary to said first message frequency;
• first detector means for detecting first message units in exclusive response to said first message frequency filtered by said first filter means;
• second detector means for detecting second message units in exclusive response to said second message frequency filtered by said second filter means, where said second message units are complementary to said first message units of said first detector means;
• first storage means for storing said first message units of said first detector means;
• second storage means for storing said second message units of said second detector means;
• first decoder means for decoding a first command signal in relation to said first message units stored in said first storage means;
• second decoder means for decoding a second command signal in complementary relation to said second message units stored in said second storage means;
• and
• means for providing said speed error signal to said traction equipment in relation to a predetermined comparison of said first and second command signals with said first and second feedback signals of said traction equipment.