INTERACTIVE TOYS AND A METHOD OF SYNCHRONIZING OPERATION THEREOF
Individual audio tracks ( 20 - 24 ) for interactive reproduction at a remote toy ( 104 ) are each encoded with a sub-audible tone ( 12 - 18 ) or code that uniquely identifies the track with audible output and/or functional operation of the toy ( 104 ). Detection of the sub-audible tone at the interactive toy opens the audio path and permits related motor control in the toy, whereas absence of a relevant sub-audible tone disables at least the audio and, preferably, both the toy's speaker ( 122 ) and at least one controllable motor ( 130, 132 ). The sub-audible tone ( 12 - 18 ) or code is inserted for the duration of activity only and may come into and out of existence as a specific character track (amongst the plurality of individual audio tracks) moves between active and inactive phases. The audio tracks for remote transmission at the toys ( 104 ) are assigned to only a first channel of a stereo audio circuit, with a second channel of the stereo circuit assigned to support a context or background track that is produced from speakers ( 51 ) of a media player ( 54 ) physically separate from the remote toys ( 104 ). Conventional synchronized transmission of both stereo channels provides a basis for interaction, with synchronicity between the media player (54) and the remote toy ( 104 ) maintained by the sub-audible tones ( 12 - 18 ). For simultaneous audio activity in multiple toys, a different sub-audible tone is used relative to individual tones or codes used to control audio output and operation of those multiple toys.
1 . A method of supporting an interactive audio experience between a media player and a plurality of remotely located toys, the method comprising:
assigning a context audio track to a first channel to an audio system having two channels;
generating a composite audio signal from a plurality of audio tracks, each audio track associated with a specific one of the plurality of toys, the composite audio signal assigned to a second, different channel of the audio system;
assigning and embedding a unique activation code into each track, the activation code present for substantially an entire duration of activity of each speech segment on each track;
broadcasting the composite audio signal; and
at each of the plurality of toys, detecting the presence of any affiliated activation code within the broadcast signal and opening an audio gate and audio output for the duration of the detection of the affiliated activation code.
2 . The method of claim 1 , further comprising:
in response to detection of an affiliated activation code, controlling operation of a motor in the toy.
3 . The method of claim 1 , further comprising:
in response to the presence of overlapping audio on multiple tracks, assigning a unique activation code for the overlapping period for the plurality of toys whose audio overlaps.
4 . The method of claim 1 , wherein the activation code comprises a sub-audible CTCSS tone.
5 . A computer program containing computer code configured to, when run on a computer, implement procedure to execute the steps of claim 1 .
6 . An interactive toy comprising:
a receiver chain configured to receive a composite audio signal containing multiple audio tracks associated with the operation of multiple different toys, the receiver chain being configured to separate an audio output from embedded activation codes associated with the audio output;
a controller configured to:
detect the presence of a pre-assigned activation code affiliated to the toy; and
open an audio gate for the duration of detection of the pre-assigned activation code, whereby the audio output is reproduced from the toy.
7 . The interactive toy of claim 6 , further comprising a motor, wherein the controller is configured to control operation of the motor in conjunction with the audio gate, the operation of the motor also dependent upon detection of the pre-assigned activation code.
8 . An interactive toy system comprising:
a plurality of interactive, each comprising:
a receiver chain configured to receive a composite audio signal containing multiple audio tracks associated with the operation of multiple different toys, the receiver chain configured to separate an audio output from embedded activation codes associated with the audio output;
a controller configured to:
detect the presence of a pre-assigned activation code affiliated to the toy; and
open an audio gate for the duration of detection of the pre-assigned activation code, whereby the audio output is reproduced from the toy; and
a media player configured to:
assign a context audio track to a first channel of an audio system having two channels;
generate a composite audio signal from a plurality of audio tracks, each audio track associated with a specific one of the plurality of toys, the composite audio signal assigned to a second, different channel of the audio system;
assign and embed a unique activation code into each track, the activation code present for substantially an entire duration of activity of each speech segment on each track; and
a transmitter for broadcasting the composite audio signal, wherein time synchronization exists between the first and second channels of the audio system and time synchronization exists between the context audio track presented by the media player and the audio presented at each of the plurality of interactive toys by virtue of the embedded activation Codes.
9 . (canceled)
10 . A media player including a transmitter, the media player configured to:
assign a context audio track to a first channel of an audio system having two channels;
generate a composite audio signal from a plurality of audio tracks, each audio track associated with a specific one of the plurality of toys, the composite audio signal assigned to a second, different channel of the audio system;
assign and embed a unique activation code into each track, the activation code present for substantially an entire duration of activity of each speech segment on each track; and wherein
the transmitter is configured to modulate and broadcast the composite audio signal such that time synchronization exists between the first and second channels of the audio system and time synchronization exists between the context audio track presented by the media player and the audio presented at each of the plurality of interactive toys by virtue of the embedded activation codes.
11 . The media player according to claim 10 , wherein the media player is configured to, in response to the presence of overlapping audio on multiple tracks each associated with individual interactive toys, assign a unique activation code for the overlapping period for interactive toys whose audio overlaps.
12 . The media player according to claim 10 , wherein the activation code comprises a sub-audible CTCSS tone.