METHODS OF OPERATING A DUAL DECODER PORTABLE MEDIA DEVICE

• US 20080285659A1
• Filed: 05/14/2008
• Published: 11/20/2008
• Est. Priority Date: 05/14/2007
• Status: Active Grant

• Current Assignee: Western Digital Israel Limited (Western Digital Corporation)
• Original Assignee: SanDisk IL Ltd. (Western Digital Corporation)
• Inventors: Harari, Eliyahou, Raines, Moshe, Carmeli, Ran
• Granted Patent: US 8,213,519 B2
• Time in Patent Office: Days
• US Class Current: 375/240.25
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3293 by switching to a less power-consuming processor, e.g. sub-CPU
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 9/7921 for more than one processing mode
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8047 using transform coding
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

Methods of operating a portable media device 100 including two onboard hardware media decoders (124, 128) operative to decode a given digital content item 148 are disclosed. In some embodiments, one of the onboard hardware media decoders 128 has a relatively high power consumption and produces a relatively ‘high quality’ media signal, and the other of the onboard hardware media decoder 124 has a relatively low power consumption and produces a relatively ‘low quality’ media signal. In one non-limiting use case: (i) when no external power is available, the relatively ‘low power’ hardware media decoder 124 may generate a relatively ‘low quality’ media signal which is presented on an onboard display screen 140a and/or onboard speaker 140b; and (ii) when external power is available, the relatively ‘high power’ hardware media decoder 128 may generate a relatively ‘high quality’ media signal which is exported out of the portable media device 100 via one or more media ports, and presented on an external host presentation device 160 (for example, a large-screen television).

Claims

1. ) A method of decoding a given digital content item by a portable media device having a housing, a first onboard hardware media decoder associated with the device housing, a second onboard hardware media decoder associated with the device housing and a media output port mechanically integrated with the device housing, the method comprising:

a) using the first onboard hardware media decoder associated with the device housing of the portable media device, effecting a first media decoding of the given digital content item to generate a first media signal;

b) using the second onboard hardware media decoder associated with the device housing of the portable media device, effecting a second media decoding of the given digital content item to generate a second media signal; and

c) exporting at least one of the generated media signals via the media output port that is mechanically integrated with the device housing.

2. ) The method of claim 1 wherein:

i) the method further comprises;

d) displaying the first media signal on an onboard display screen that is mechanically integrated with the device housing of the portable media device;

ii) the exporting of step (c) includes exporting the second media signal via the media output port; and

iii) the method is carried out so that no output media signal from the first onboard hardware media decoder is exported from the portable media device to any external device.

3. ) The method of claim 1 wherein the first and second decodings are carried out such that a ratio between a power consumption of the second hardware media decoder at a time of the second decoding and a power consumption of the first hardware media decoder at a time of the first decoding is at least 2.

4. ) The method of claim 1 wherein:

i) the effecting of the second decoding is contingent upon an availability of external power to the portable media device via the media output port; and

ii) the effecting of the first decoding is not contingent upon an availability of any external power to the portable media device.

5. ) The method of claim 1 wherein:

i) the first media decoding is a first video decoding so that the first media signal is a first video signal;

ii) the second media decoding is a second video decoding so that the second media signal is a second video signal;

iii) the first and second video decodings are carried out such that at least one video quality relation selected from the group consisting of a first video quality relation and a second video quality relation is true; and

iv) the first and second video quality relations are defined as follows;

A) according to the first video quality relation, a ratio between a total number of pixels of a video image of the first video signal and a total number of pixels of a video image of the second video signal is at most ⅓

; and

B) according to the second video quality relation, a ratio between a color depth of a video image of the first video signal and a color depth of video image of the second video signal is at least 1.5.

6. ) The method of claim 1 wherein:

i) the first media decoding is a first video stream decoding so that the first media signal is a first video stream;

ii) the second media decoding is a second video stream decoding so that the second media signal is a second video stream;

iii) the first and second video stream decodings are carried out such that a ratio between a frame refresh rate of the first video stream and a refresh rate of the second video stream is at most ½

.

7. ) The method of claim 1 wherein:

i) the first and second media decoding are carried out so that at least one operation condition selected from the group consisting of a first operation condition and a second operation condition is true; and

ii) the first and second operations condition are defined as follows;

A) according to the first operation condition, the first and second media signals are simultaneously generated from the given digital media content item; and

B) according to the second operation condition, the first and second media signals are generated sequentially.

8. ) The method of claim 1 wherein:

i) the first and second media decoding are carried out so that at least one operation condition selected from the group consisting of a first operation condition and a second operation condition is true; and

ii) the first and second operations condition are defined as follows;

A) according to the first operation condition, at least one of the first media signal and the second media signal is a static video signal; and

B) according to the second operation condition, each of the first and second media signals is a streaming video signal.

9. ) The method of claim 1 wherein:

i) the first media decoding is carried out so that the first media signal is a first video stream;

ii) the second media decoding is carried out so that the first media signal is a second video stream; and

iii) the first and second media decodings carried out so that the first and second video streams are synchronized playback streams of the given content item.

10. ) The method of claim 1 wherein:

i) the first media decoding is carried out so that the first media signal is a first video stream;

ii) the second media decoding is carried out so that the first media signal is a second video stream;

iii) the method further comprises;

d) in accordance with input received via a user control mechanically integrated with the housing of the portable media device, determining a video stream time difference between the first and second playbacks; and

iv) the first and second media decodings are carried out according to the determined video stream time difference.

11. ) The method of claim 1 wherein:

i) the method further comprises;

d) presenting the first media signal on an onboard media presentation device mechanically integrated with the device housing;

e) detecting an inter-device coupling via the media port at a time when;

A) the first media decoding is being carried out by the first onboard hardware media decoder to generate the first media signal from the digital media content item; and

B) the onboard display presentation device is presenting the first media signal;

ii) the second decoding of the given digital media content item by the second hardware media decoder to generate the second media signal is commenced in response to the detected inter-device coupling; and

iii) the exporting of the second media signal via the media output port is carried out in response to the detected inter-device coupling.

12. ) The method of claim 11 further comprising:

f) further responding to the inter-device coupling by ceasing at least one of

i) the decoding of the digital content item by the first hardware media decoder; and

ii) the presenting of the first media signal by the onboard media presentation device.

13. ) The method of claim 11 further comprising:

f) after the commencing of the second decoding of the given digital content item by the second hardware media decoder which occurs after the inter-device coupling, continuing;

i) the first decoding of the digital content item by the first hardware media decoder; and

ii) the presenting of the first media signal by the onboard media presentation device.

14. ) The method of claim 1 wherein the commencing of the second decoding of the given content item by the second hardware media decoder is carried out in accordance with a streaming media playback bookmark of the first hardware media decoder.

15. ) The method claim 1 wherein the first and second media decodings are carried out to provide at least one of:

i) a look-ahead functionality of the second media signal relative to the first media signal;

ii) a look-back functionality of the second media signal relative to the first media signal; and

iii) a flexible time domain of the second media signal relative to the first media signal.

16. ) The method of claim 1 wherein:

i) the method further comprises;

d) detecting a decoupling via the media port that occurs at a time when;

A) the second hardware media decoder is effecting the second media decoding of the given digital media content item to generate the second media signal from the digital media content item; and

B) the media output port is exporting the second media signal, and

e) in response to the detected decoupling, ceasing the second media decoding of the digital media content item by the second hardware media decoder; and

ii) the first media decoding of the given digital media content item by the first hardware media decoder is commenced in response to the detected decoupling.

17. ) The method of claim 1 further comprising:

d) displaying the first media signal on an onboard display mechanically integrated with the device housing;

e) detecting a decoupling via the media port that occurs at a time when;

A) the second hardware media decoder is effecting the second media decoding of the given digital media content item to generate the second media signal from the digital media content item;

B) the media output port is exporting the second media signal,

C) the first hardware media decoder is effecting the first media decoding of the given digital media content item to generate the first media signal from the digital media content item; and

D) the first media signal is displayed on the onboard display; and

f) in response to the detected decoupling, ceasing the second media decoding of the digital media content item by the second hardware media decoder; and

g) continuing the first media decoding and the displaying of the first media signal after the detecting and after the ceasing.

18. ) The method of claim 1 further comprising:

h) in accordance with input received via a user control mechanically integrated with the housing of the portable media device, effecting a mode transition between any of a first mode, a second mode and a third mode,

wherein the first, second and third modes are defined as follows;

i) when in the first mode, the first hardware media decoder is active and the second hardware media decoder is dormant;

ii) when in the second mode, the second hardware media decoder is active and the first hardware media decoder is dormant; and

iii) when in the third mode, both of the first hardware media decoder is active and the second hardware media decoder are active.

19. ) A method of operating a media device having a first onboard hardware media decoder and a second onboard hardware media decoder, the method comprising:

a) determining if external available power is available to the media device;

b) if the external power is available, activate the second onboard hardware media decoder; and

c) otherwise, activate the first onboard hardware media decoder without activating the second onboard hardware media decoder.

20. ) A method of operating a media device having a low-power onboard hardware media decoder a high-power onboard hardware media decoder an onboard display screen and a device port the method comprising:

a) using the low-power hardware onboard decoder effecting a first media playback to generate a first video stream;

b) presenting the first video stream on the onboard display screen;

c) in response to a detected coupling event of the device port that occurs at a time when;

i) the low-power onboard hardware media decoder is generating the first video stream; and

ii) the onboard display screen is presenting the first video stream,

commencing a second media playback, using the high-power onboard hardware media decoder, to generate a second media stream; and

d) exporting the second media stream via the device port.

21. ) The method of claim 20 further comprising:

e) in response to the detected coupling event, ceasing the first playback by the low-power onboard hardware media decoder.

22. ) The method of claim 20 wherein the first media playback and the presentation of the first video stream of step (b) continues simultaneously with the exporting of the second media stream via the device port.

23. ) The method of claim 20 wherein the second media playback of step (c) is carried out in accordance with a media bookmark of the first media playback by the low-power onboard hardware media decoder at a time of the device port coupling event.

24. ) A method of operating a media device having a low-power onboard hardware media decoder and a high-power onboard hardware media decoder, an onboard screen and a device port, the method comprising:

a) using the high-power onboard hardware media decoder, generating a first video stream;

b) exporting the first video stream via the device port;

c) in response to a detected decoupling event of the device port that occurs at a time of the exporting, commencing a second media playback, using the low-power onboard hardware media decoder, to generate a second media stream; and

d) presenting the second video stream on the onboard screen.

25. ) The method of claim 24 wherein the second media playback of step (c) is carried out in accordance with a media bookmark of the high-power onboard hardware media decoder at a time of the device port decoupling event.